A selection of free tools for developers

Today we bring to your attention an adapted selection of tools (including cloud) for developers who allow you to create truly high-quality projects. Here are presented only SaaS, PaaS and IaaS services that provide free packages for infrastructure software developers.

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Source Repositories

• bitbucket.org - free private repositories (GIT and Mercurial), which can work with up to five people;
• chiselapp.com - unlimited free public and private Fossil repositories;
• github.com - unlimited free public repositories;
• about.gitlab.com - unlimited free public and private GIT repositories. The number of participants is also unlimited;
• hub.jazz.net - unlimited free public repositories. Three free private repositories;
• visualstudio.com - unlimited free private repositories (GIT and TFS), which can be used by up to five people at a time;
• assembla.com - unlimited free repositories;
• www.fogcreek.com/kiln - unlimited number of public and private repositories (a hybrid of GIT and Mercurial) for two users;
• www.plasticscm.com - free repositories for individual developers, open source projects (OSS) and non-profit organizations;
• Cloud Source Repositories are free private GIT repositories deployed on the Google Cloud cloud platform. The service supports synchronization with the GitHub and Bitbucket repositories. Storage size up to 500 MB.

Tools for teams and collaboration

• appear.in - one-click free video calls;
• www.flowdock.com - chat and mail for teams of up to five people;
• slack.com is a free tool in the basic version that can be used by teams of any size, but with some limitations of functionality;
• hipchat.com is also a free tool that can be used by teams of any size, but with some limitations of functionality;
• gitter.im - chat for github . Unlimited private and public chat rooms for teams of up to 25 people;
• www.google.com/hangouts - all means of communication in one place. Authorization requires a Google account;
• seafile.com - private or cloud storage, file sharing, synchronization and discussion. Private storage - without restrictions, cloud storage - 1 GB;
• sameroom.io is a free tool that can be used by teams of any size, but with some limitations of functionality;
• yammer.com is a private social network for organizations (can be used in conjunction with MS Office 365). The free version has limited admin functionality;
• www.blockspring.com is a service for sharing scripts with all members of your team: multilingual + spreadsheet support. 5 million launches per month for free;
• helpmonks.com - shared mailbox for teams - free for non-profit organizations and open source projects;
• typetalk.in - a service for exchanging ideas and discussing them with a team using instant messages - you can communicate over the network or through an application on your phone;
• talky.io - free video conferencing. Anonymously. P2P. No plug-ins and registration;
• sourcetalk.net is a tool for discussing code. Free if the code is laid out for everyone to see;
• vipaar.com - video help with augmented reality. The free version is available without analytics, encryption and support;
• evernote.com is a tool for organizing information. Share notes and work together;
• www.wunderlist.com is a tool for sharing and scheduling tasks with colleagues at work. Free apps for iPhone, iPad, Mac, Android, Windows are available. It is possible to work on the network through a browser;
• doodle.com - convenient calendar service;
• sendtoinc.com is a service that allows you to exchange links, notes, files. Free for three people. 100 MB storage;
• www.zoom.us - secure video and web conferencing. Add-ons and plugins are available. You can use it for free for up to 40 minutes;
• ideascale.com - allows customers to share ideas and vote for the best. Free for teams of up to 25 people;
• filehero.io - provides a simplified way to access a company's file storage from a corporate page. In free mode, there are five parallel downloads maximum;
• codenvy.com is a cloud-based IDE. Build Environment, Debugging Environment, and Runtime Environment. The free paid package provides 4 GB of storage and supports more than 90 languages;
• wistia.com - video hosting with analytics views, support for HD and marketing tools to help understand the behavior of site visitors. Only 25 videos and the Wistia player are available for free.

Quality code

• tachikoma.io - update dependencies for Ruby, Node.js and Perl projects - free for open source projects;
• gemnasium.com - also update dependencies for Ruby and Node.js projects - free for open source projects;
• landscape.io - code quality assessment for Python projects - free for open source projects;
• codeclimate.com - automated code quality assessment - free for open source projects;
• houndci.com - comments about the quality of the code to commits on Github - free of charge for open source projects;
• coveralls.io - helps to make sure that your tests cover all the written code - free for open source projects;
• scrutinizer-ci.com - continuous code control - free for open source projects;
• codecov.io - test code coverage assessment tools (SaaS) - free for open source projects;
• insight.sensiolabs.com - code quality assessment for PHP / Symfony projects - free for open source projects;
• www.codacy.com - automated code quality assessment for PHP, Python, Ja-vaScript, Scala and CSS - free for open source projects;
• www.pullreview.com - automated code quality assessment for Ruby on GitHub, Bitbucket and GitLab - free for open source projects;
• gocover.io - evaluation of code coverage by tests for all Go packages;
• inch-ci.org - badges for documentation of Ruby, JS and Elixir projects;
• scan.coverity.com - static code analysis in Java, C / C ++, C # and JavaScript - free of charge for open source projects;
• www.webceo.com - CEO-tools with code verification capabilities and various tips;
• zoompf.com - improving site performance, detailed analysis
• www.websitetest.com is a Yotta website optimization tool. Free online version (has limitations);
• gtmetrix.com - reports and recommendations for optimizing websites;
• browserling.com - interactive cross-browser testing in real time. Free three-minute sessions with MS IE 9 under Vista at a resolution of 1024x768;
• loadfocus.com - load tests and speed tests for websites, mobile applications and APIs. 5 tests per month for free: 120 customers per test, 1 location.

Search by code and browsing

• sourcegraph.com - search by code / comparative search for Java, Go, Python, Node.js, and so on - free of charge for open source projects;
• searchcode.com - full text search by code - free for open source projects;

Continuous Integration and Deployment (CI / CD)

• codeship.com - 100 private assemblies per month, 5 projects - no restrictions for open source projects;
• circleci.com - free for one current project;
• travis-ci.org - free for GitHub public repositories;
• wercker.com - free for public and private repositories;
• drone.io - platform for continuous integration with cross-browser testing - free for open source projects;
• semaphoreci.com - 100 private builds per month - no restrictions for open source projects;
• www.shippable.com - one container, private and public repositories, an unlimited number of assemblies;
• snap-ci.com - free for public repositories. Maximum one current build;
• www.appveyor.com - continuous deployment service for Windows - free for open source projects;
• Comparison of continuous integration services ;
• saucelabs.com is a continuous integration service with the ability to test the scalability of mobile and web applications — free of charge for open source projects;
• ftploy.com - one project with an unlimited number of scans;
• deployhq.com - one project, ten scans per day;
• hub.jazz.net - 60 minutes to build per month;
• styleci.io - for GitHub public repositories only;
• deploybot.com is free for one repository (private or public). Supports any services;
• www.bitrise.io - continuous integration and deployment for iOS, 200 free builds per month.

Security and public key infrastructure (PKI - Public Key Infrastructure)

• crypteron.com is a cloud-based, developer-friendly security platform whose mission is to close gaps in .NET and Java applications;
• vaddy.net - website security audit, as well as continuous integration tools. 3 domains, a history of 10 scans;
• www.globalsign.com/en/ssl/ssl-open-source - free SSL certificates for open source projects;
• www.startssl.com - free SSL certificates;
• www.soclall.com - allows you to share news in more than 20 social networks (up to 1000 users in the free version);
• stormpath.com - user management, authentication and login to social networks, as well as single sign-on (SSO) technology;
• auth0.com - single sign-on (SSO) technology for developers;
• getclef.com - new authorization solution - free, if you do not use premium features;
• ringcaptcha.com - tools that allow you to use a user's phone number as an ID;
• www.ssllabs.com/ssltest - deep analysis of the configuration of any SSL server;
• qualys.com/forms/freescan/owasp - searching for application vulnerabilities, checking for OWASP classification;
• alienvault.com ThreatFinder - detection of compromised systems in your network;
• duosecurity.com - two-factor authentication for a website or application. Free for up to 10 users, all authentication methods are available without restrictions. Hardware keys;
• www.tinfoilsecurity.com - automated vulnerability scan. Weekly XSS scan;
• www.acunetix.com/free-network-security-scanner - free search for vulnerabilities and network scanning of three targets;
• www.ponycheckup.com - automated security check for Django websites;
• www.foxpass.com - LDAP and RADIUS systems that simplify connections to servers, VPNs, and wireless networks. Up to 10 users for free;
• www.opswatgears.com - security control of computers (and other devices), applications, configurations and so on. Free up to 25 users, history is kept for 30 days;
• bitninja.io - botnet protection through a blacklist. Limited amount of information for each attack;
• www.onelogin.com - IDaaS, single sign-on technology, cloud identification of users. Up to three company applications and five personal applications. The number of users is not limited;
• www.logintc.com - two-factor authentication via push-notifications. Free for 10 users. VPN, websites and SSH.

Control system

• bitnami.com - deploying applications in the cloud. Free management of one AWS microinstantia;
• www.visualops.io - manage 5 instances (3,600 hours) per month.

Log Management

• papertrailapp.com - search within 48 hours, seven-day archiving, 100 MB per month;
• logentries.com - 5 GB per month, seven-day storage;
• www.loggly.com - free for one user (watch lite package);
• sematext.com/logsene - 1 million logs, unlimited storage time;
• www.sumologic.com - 500 MB per day, seven-day storage.

Translation Management

• lingohub.com - free for up to 3 users - always free for open source projects;
• www.getlocalization.com - free for public projects;
• webtranslateit.com - up to 500 lines for free;
• transifex.com - free for open source projects;
• www.oneskyapp.com - limited free version for five users - free for open source projects;
• crowdin.com - unlimited number of projects. Unlimited lines and members for open source projects;

Monitoring

• opbeat.com - monitoring application performance, errors and versions. Data storage up to 24 hours for free;
• checkmy.ws/en/solutions/free-forever-for-foss is a fifteen- day demo with all the features. For open source projects, 3 sites are always free;
• www.appneta.com - data storage for 1 hour;
• www.thousandeyes.com - monitoring networks and user behavior. 3 locations, 20 data feeds;
• www.datadoghq.com - free up to five sites;
• www.stackdriver.com - up to 10 servers / applications for free;
• keymetrics.io - free up to 2 servers. Seven-day data storage;
• newrelic.com - free with 24-hour data storage;
• nodequery.com is a simple server monitor. Maximum 10 servers;
• www.pingdom.com/free - free for one site;
• www.watchsumo.com - free monitoring sites. Ping every 5 minutes, 50 links [restriction on the number of links removed - approx. lane];
• www.opsgenie.com - sending notifications to a mobile phone. 600 free notifications per month for two users;
• www.runscope.com - monitoring API and logs. 2500 requests per month for one user for free;
• www.circonus.com - 20 metrics for free [500 metrics - approx. lane];
• uptimerobot.com - monitoring websites, 50 monitors for free;
• www.statuscake.com - website monitoring, any number of tests (with restrictions);
• www.boundary.com - one-second resolution (up to ten servers);
• ghostinspector.com - free monitoring of sites and web applications. One user, 100 tests per month;
• java-monitor.com - free JVM monitoring and time evaluation of continuous work;
• sematext.com/spm - 24-hour metrics, an unlimited number of servers, 10 individual metrics with 500K data points, an unlimited number of users and information output windows;
• sealion.com - free for 2 servers, data is stored for three days and displayed in the form of diagrams and command execution results (top, ps, ifconfig, netstat, iostat, free and others);
• www.stathat.com - ten metrics for free;
• www.skylight.io - the first 100K requests for free;
• www.appdynamics.com - 24-hour metrics, agents for managing application performance: one for Java, one for .NET, one for PHP and one for Node.js;
• deadmanssnitch.com - monitoring task schedulers. One free monitor, but thanks to the referral system you can get more;
• www.librato.com - free for 100 metrics, 60-second resolution;
• freeboard.io is free for open source projects. Graphs and charts for IoT projects;
• loader.io - tools for load testing with functional limitations;
• www.probeapi.com - API performance monitoring, ping checking, DNS and so on;
• blackfire.io - SaaS solutions to improve application performance. The free package for review is called Hack;
• apimetrics.io - automated API performance monitoring, as well as testing and analytics. Manual API call, test launch only from servers located on the West Coast of the USA;
• www.opsdash.com - Monitoring servers, clusters and services. Free for 5 servers and 5 services.

Handling Errors and Exceptions

• rollbar.com - monitoring exceptions and errors. 5000 errors per month, unlimited number of users, data is stored for 30 days;
• bugsnag.com - 2000 errors per month after the test period;
• airbrake.io - the service automatically groups, organizes application errors and notifies you about them. Handling 7,200 errors per day per user. One project, data is stored for 2 days;
• getsentry.com - tracking application exceptions in real time. 14-day test period. Unlimited use if self-hosted.

Search

• www.algolia.com - real-time search: 1000 documents and 50,000 operations. Large [by functionality] plans are available free of charge for developers of projects with open source code;
• swiftype.com - search engine (API and crawler). One search engine that processes up to 1000 documents is available for free. Free Premium Upgrade for open source projects;
• bonsai.io - 1 GB of memory and 1 GB of storage for free;
• www.searchly.com - 2 free indexes. 5 MB storage;
• facetflow.com - Elasticsearch for Microsoft Azure. 5000 documents and 500 MB;
• indexisto.com is an updated search engine. The limit of documents: 10 million. There is an ad unit.

post office

• www.sparkpost.com - the first 10,000 emails per month for free;
• www.mailgun.com - also the first 10,000 emails per month for free;
• mailchimp.com - free 2000 subscribers and 12000 emails per month;
• sendloop.com - free 2000 subscribers and 10,000 emails per month;
• sendgrid.com - 400 emails per day for free. 25,000 free service messages per month sent from Google Compute Instance or Microsoft Azure App Service;
• mandrill.com - the first 2000 free letters;
• www.phplist.com - 300 free emails per month;
• www.mailjet.com - 6000 emails per month for free;
• www.sendinblue.com - 9000 emails per month for free;
• mailtrap.io - dummy SMTP server for development; free plan: 1 mailbox, 50 messages, you can not attract members of the team, sending two letters per second, no forwarding;
• mailstache.io - 4 mailboxes , each 1 GB in size, 2 domains;
• postmarkapp.com - the first 25,000 letters for free;
• www.zoho.com/mail - free mail management and communication tool (10 users);
• domain.yandex.com/domains_add - free mail and DNS hosting for up to 1000 users;
• moosend.com is a mailing list management service. Free account for 6 months for startups;
• debugmail.io - an easy-to-use mail server for developers;
• mailboxlayer.com - email address verification and JSON API verification for developers. 1000 API requests per month for free;
• mailcatcher.me - mail interception with subsequent processing via the web interface;
• www.yopmail.fr/en - one-time email addresses.

CDN and protection

• www.cloudflare.com - the main service is free, well suited for a blog. Cloud-flare also provides free SSL certificates;
• www.bootstrapcdn.com - CDN for bootstrap, bootswatch and font awesome;
• surge.sh - unlimited number of publications, one team;
• cdnjs.com - CDN for JavaScript libraries, CSS libraries, SWF libraries, images, and so on;
• www.jsdelivr.com - very fast CDN (JS, CSS, fonts) for developers and administrators;
• developers.google.com/speed/libraries is a content delivery network for the most popular JavaScript libraries that are publicly available;
• www.asp.net/ajax/cdn - Microsoft Ajax content distribution network contains popular JavaScript libraries, such as jQuery, and makes it easy to add them to a web application;
• toranproxy.com is a proxy for Packagist and GitHub. Guaranteed content delivery. The service is free for personal use, 1 developer, no support;
• rawgit.com - limited traffic, serves files directly from GitHub with valid Content-Type headers;
• www.incapsula.com - CDN and DDoS protection;
• www.fastly.com - CDN, all functions are free until the threshold of $ 50 per month is reached (most are enough), then the provision of services is suspended until payment is made;
• ddos-protection.io - free protection against DDoS attacks for an unlimited number of websites;
• www.section.io is a simple way to launch and manage the Varnish Cache solution. Presumably free for one site;
• www.netdepot.com/cdn - the first 100 GB per month for free.

PaaS

• restlet.com/products/apispark - APISpark, through an intuitive interface, allows any API, application or data manager to become an API provider;
• cloud.google.com/appengine - Google App Engine provides 28 instance hours, 1 GB for the NoSQL database, and much more for free;
• www.engineyard.com - Yard engine provides 500 hours of work for free;
• azure.microsoft.com - MS Azure gives you a free test of the services of a service worth up to $ 200;
• hpcloud.com - provides free services worth $ 300 for 90 days;
• appharbor.com - PaaS .Net - one free worker;
• shellycloud.com is a platform for hosting Ruby and Ruby on Rails applications. Shelly Cloud provides free services worth € 20 for a test period;
• www.heroku.com - cloud hosting, free for single-process applications;
• www.firebase.com - create real-time applications. Maximum 100 connections, data transfer up to 10 GB, hosting storage of 1 GB in size, hosting transfer of 100 GB;
• bluemix.net - IBM PaaS with free monthly access;
• www.openshift.com - Red Hat PaaS, three containers with 512 MB of memory and 1 GB storage (see how to quickly scan applications);
• algorithmia.com - all algorithms, 10,000 credits are issued at the start (seconds of service time), CLI support;
• bigml.com - machine learning algorithms. Unlimited free development tasks, 16 MB per task;
• www.activestate.com/stackato - PaaS-platform from ActiveState, hardened to work with large projects. 20 GB for private, public and hybrid storage;
• www.outsystems.com - PaaS platform for local and cloud corporate web development. A free “personal environment” makes it possible to write an unlimited number of lines of code and provides a database of 1 GB;
• platform.telerik.com - Build and deploy JavaScript applications. 100 MB for data storage, 1 GB for storing files, 5 GB throughput, 1 million push notifications for BaaS, 100 active devices for collecting analytical data;
• scn.sap.com/docs/DOC-56411 - PaaS offer from SAP, stored in memory. Free developer accounts have 1 GB of memory for structured data, 1 GB for unstructured, 1 GB of GIT data, and allow you to run applications on HTML5, Java, and HANA XS;
• www.mendix.com - accelerated application development for enterprises - an unlimited number of sandboxes supporting up to 10 users who have 100 MB of memory for storing files and 100 MB for storing a database;
• www.pythonanywhere.com - cloud hosting for an application in Python. A free account for beginners allows you to run 1 application on the% username% .pythonanywhere.com domain. Available private storage capacity of 512 MB and one MySQL database;
• www.tutum.co - Docker Platform for DevOps Engineers: build, deploy, and manage your applications in any cloud. Free during beta testing. When the service is launched, a free developer package will appear;
• www.configure.it is a platform for developing mobile applications, two projects are free. Functions are limited, but resources are not;
• stamplay.com - 50K API calls, data exchange of up to 100 GB, storage of 1 GB;
• qtcloudservices.com/products/managed-runtime - a managed platform with a micro-instance and a database;
• elastx.com/start/easypaas - 4 cloudlets, need to be updated every year;
• viaduct.io - 350 MB of RAM and 1 GB database;
• pagodabox.io - a small worker, web server, cache and database;
• www.cloudandheat.com/en/paas.html - 128 MB of RAM, support for individual domain names;
• www.apicastor.com - conversion of spreadsheets to URL with the ability to control access;
• www.formlets.com - online forms, unlimited number of forms on one page per month, 100 confirmations per month, email notifications;
• superfeedr.com - receiving, transmitting and analyzing real-time data using the PubSubHubbub protocol. The free version has functional limitations.

BaaS

• apigee.com/docs/api-baas (documentation), apigee.com/docs/developer-vs-edge (registration) - an unlimited trial version (managed by API) includes a NoSQL database with 25 GB of memory, as well as functions user management and access, geolocation, 10 million push-notifications per month, remote management, A / B testing (beta). The service is available and managed through the user interface, SDK or API;
• appacitive.com - back-end for mobile applications. 3 months with 100K API calls, push notifications;
• bip.io is a web automation platform that makes it easy to connect web services. For open source projects, GPLv3 is available. Commercial OEM license;
• www.blockspring.com - cloud functions, 5 million launches per month;
• www.contentful.com - CaaS. Content management and API delivery in the cloud. 3 users, 3 repositories and 1 million API requests per month;
• www.kinvey.com - back-end for mobile applications. Unlimited requests per second with 2 GB of data storage, as well as push notifications for 5 million unique recipients. Enterprise application support;
• konacloud.io - back-end for mobile applications and the web, an account with 5 GB of memory for free;
• layer.com - full-stack-pattern for communications;
• www.parse.com - back-end for mobile applications. 30 requests per second, 20 GB for storing files and databases, push notifications for 1 million unique recipients;
• quickblox.com - back-end for developing applications for sending instant messages, voice and video calls, push notifications;
• pushbots.com - push notification service, 1.5 million notifications per month for free;
• www.dreamfactory.com - DreamFactory is an open source platform that provides all the RESTful services needed to create a fantastic mobile and web application;
• www.mashape.com - API Marketplace and powerful tools for private and public APIs. In the trial version there are limitations of the functional: monitoring, alerts and support;
• onesignal.com - unlimited push notifications;
• getstream.io - building scalable news feeds and feeds in just a few hours, 3 million tape updates per month for free;
• tyk.io - API management with authentication, allocated memory control, monitoring and analytics. Free cloud service;
• www.iron.io - asynchronous processing of tasks (like AWS Lambda) with a free package and a month of free trial period;
• stackhut.com - asynchronous task processing (like AWS Lambda). 10 free of charge vatnyh services and an unlimited number of public services;
• www.pubnub.com - free push-notifications up to 1 million messages per month, 100 active devices per day;
• webtask.io - run programs using HTTP requests. No resource allocation, no sweep. Auth0 is being developed;
• zapier.com - combine your applications to automate tasks. 5 bundles every 15 minutes, 100 tasks per month;
• stackstorm.com is an event-driven automation for applications, services, and workflows. The free version does not work with streams, does not have access control and LDAP.

Web hosting

• closeheat.com is a cloud development environment for static websites with free hosting and GitHub integration. One free website with an individual domain name;
• www.simplybuilt.com - SimplyBuilt offers hosting (and creation) of websites for open source projects (http://www.simplybuilt.com/explore/free-websites-for-open-source-projects). A simple alternative to GitHub Pages;
• www.devport.co - allows you to turn GitHub projects, applications and websites into a personal developer portfolio;
• www.netlify.com - creating, deploying and hosting a static site or application, 100 MB storage, 1 GB bandwidth;
• divshot.com - hosting static developer sites, free simple applications, 1 GB bandwidth, 100 MB storage, individual domains, SSL for subdomains;
• pantheon.io - hosting for Drupal and WordPress, automated DevOps and scalable infrastructure. Free for developers and organizations;
• www.acquia.com - hosting for Drupal sites. Free developer package, free developer tools (for example, Acquia Dev Desktop);
• www.bitballoon.com - BitBalloon offers hosting for static sites and applications. Free on subdomain;
• freedns.afraid.org - free DNS hosting;
• dns.he.net - free DNS hosting with support for dynamic DNS;
• readthedocs.org - free documentation hosting with version control documents, creating PDF documents and much more;
• www.luadns.com - free DNS hosting, 3 domains, all functions with reasonable restrictions;
• bubble.is - visual programming for creating mobile and web applications without writing code. Free up to 100 visitors per month, 2 applications.

IaaS

• aws.amazon.com/free is a free AWS package for 12 months;
• exoscale.ch - free resources for open source projects;
• developer.rackspace.com - Rackspace Cloud gives $ 50 per month for 12 months;
• cloud.google.com/compute - Google Compute Engine gives $ 300 for 60 days;
• cloud.google.com/container-engine - Google Container Engine to launch Docker containers (alpha version). The price tag is the same as that of Google Compute Engine;
• nsone.net - DNS data driven, automatic traffic management, 1 million free queries;
• www.cronasaservice.com - cron-service for sending an unlimited number of regular HTTP requests;
• www.virtzone.net - Free VPS. May require some work experience;
• it-grad.ru is the largest Russian provider of IaaS services.

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DBaaS

• cloudant.com is a database from IBM. Free, if the set of services does not exceed $ 50 per month;
• orchestrate.io - one free application;
• redislabs.com/redis-cloud - Redis as a service, 30 MB and 30 simultaneous connections;
• www.backand.com - Back-end as a service for AngularJS;
• www.zenginehq.com - building applications for organizing the workflow in a few minutes - free for one user;
• parsehub.com - extracting data from dynamic sites, turning dynamic sites into an API, 5 projects for free;
• import.io - easy conversion of websites into an API, completely free;
• kimonolabs.com - "Turning websites into structured APIs directly from the browser in just a few seconds." Free for public APIs, getting 20 million pages per month, scheduling support, JSON, CSV, post-authorization, etc .;
• redsmin.com - online real-time monitoring and administration service for Redis, 1 Redis instance for free;
• graphstory.com - GraphStory offers Neo4j (graph database) as a service;
• www.elephantsql.com - PostgreSQL as a service, 20 MB for free;
• www.graphenedb.com - Neo4j as a service, up to 1000 nodes and 10,000 relationships for free;
• mongolab.com - MongoDB as a service, 500 MB for free;
• scalingo.com is more PaaS, but offers 512 MB for MySQL, PostgreSQL or MongoDB databases for free;
• skyvia.com is a “cloud data management platform.” All functions are available while the service is in beta;
• airtable.com - Looks like a spreadsheet, but it's a relational database. Unlimited number of databases, 1200 database requests and 1000 API requests per month;
• www.iriscouch.com - CouchDB as a service. Free for development, prototyping and so on.

STUN, WebRTC, Web Socket Servers and other tools

• pusher.com - WebSockets broker. 20 simultaneous connections and 100K messages per day for free;
• stun: stun.l.google.com: 19302 - Google STUN
• stun: global.stun.twilio.com: 3478? transport = udp - Twilio STUN
• www.segment.com - Hub for redirecting and routing events to other services. 100K events per month for free;
• ngrok.com - allows you to bring local servers through the tunnel to the real URL;
• www.cloudamqp.com - RabbitMQ as a service. A maximum of 1 million messages per month, a maximum of twenty simultaneous messages, a maximum of 100 queues, a maximum of 10,000 messages in queues, many nodes in different zones.

Project management

• www.bitrix24.com - intranet and project management tool;
• www.pivotaltracker.com/community/public-projects - Pivotal Tracker, free for public projects;
• www.atlassian.com/opensource/overview - Jira system for open source projects;
• kanbantool.com - project management based on the kanban method. Free of charge (additional services can be purchased for a fee);
• kanbanflow.com - project management based on the kanban method. Free of charge (additional services can be purchased for a fee);
• kanbanpad.com - project management based on the kanban method. Free of charge (additional services can be purchased for a fee);
• kanbanery.com - project management based on the kanban method. Free for two users (for a fee, you can purchase additional services);
• zenhub.io – GitHub. , ;
• trello.com – , . ;
• www.fogcreek.com/fogbugz – . ;
• waffle.io – GitHub, . ;
• huboard.com – GitHub. ;
• taiga.io – agile-. ;
• www.jetbrains.com/youtrack/buy/open_source_incloud.jsp – YouTrack (In-Cloud) FOSS- ( 10 : www.jetbrains.com/youtrack/buy );
• github.com – GIT-, GitHub ;
• asana.com – ;
• www.acunote.com – SCRUM- , - ;
• gliffy.com – -: , UML, . Ji-ra Confluence. 5 2 ;
• cacoo.com – - : , UML, . 15 , 25 ;
• www.draw.io – -, Google Drive, OneDrive Dropbox. ;
• hub.jazz.net – IBM Bluemix. ;
• leankit.com – , , . 10 ;
• www.visualstudio.com/products/what-is-visual-studio-online-vs – . , ;
• testlio.com – , -. ;
• www.vivifyscrum.com – Agile-. Scrum.
• www.targetprocess.com – : Scrum . - , 1000 ( www.targetprocess.com/pricing );
• overv.io – Agile- , GitHub;
• taskulu.com – , . 5 . GitHub, Trello, Dropbox Google Drive;
• www.contriber.com – . 5 ;

• www.aerofs.com – P2P- , 30 ;
• bintray.com – , . SSL, CDN REST-;
• cloudinary.com – , , , , Ruby, Python, Java, PHP, Objective-C . 7500 , 2 5 ;
• plot.ly – . 10 ;
• transloadit.com – , , . . ;
• podio.com – Podio – , ;
• shrinkray.io – GitHub;
• imagefly.io – . CDN, . 100 ;
• kraken.io – , - . 1 ;
• placehold.it – ;
• placekitten.com – . - ;
• placepenguin.com – . - ;
• embed.ly – API , , -. 5000 URL 15 ;
• backhub.co – GitHub. ;
• www.otixo.com – , , . 250 . 5 .

• Pixlr – , ;
• Imagebin – Pastebin ;
• Cloudconvert – . 208 : gif-;
• App Icon Resizer – ;
• Vectr – ;
• www.walkme.com – ( ) . 3 «» 5 «» .

• geocod.io – API CSV. 2500 ;
• gogeo.io – API ;
• cartodb.com – API ;
• www.giscloud.com – , ;
• www.mapbox.com – , SDK .

• build.opensuse.org – (SUSE, EL, Fedora, Debian );
• copr.fedoraproject.org – RPM Fedora EL;
• help.launchpad.net/Packaging – Ubuntu Debian.

IDE

• c9.io – IDE . Ubuntu . GitHub BitBucket, SFTP- GIT;
• codeanywhere.com – IDE- . FTP, SFTP, Dropbox, Google Drive, GitHub BitBucket. . , , «» , ;
• codenvy.com – IDE , , GIT/SVN, Docker (4 , , ), Google Apps;
• koding.com – IDE . sudo-, Amazon EC2, SSH-, LXC, , IP, Ubuntu 14.04, ;
• www.nitrous.io – Linux , 2 ();
• visualstudio.com/free – IDE ( Microsoft iOS Android). , , (C#, C++, JavaScript, Python, PHP );
• cloud.sagemath.com – IDE . Python, LaTeX, IPython Notebooks ;
• wakatime.com – . . , ;
• apiary.io – API mock- ( API- );
• www.mockable.io – Mockable – RESTful API SOAP -. REST API SOAP, JSON XML;
• www.jetbrains.com/products.html – , IDE . , , ;
• readme.io – – ;
• codio.com – Codio – , ;
• www.stackhive.com – IDE , HTML5, CSS3, jQuery, Bootstrap;
• www.tadpoledb.com – . Ama-zon RDS, Apache Hive, Apache Tajo, CUBRID, MariaDB, MySQL, Oracle, SQLite, MSSQL, PostgreSQL MongoDB;
• www.sourcelair.com – IDE Django, JavaScript, HTML5, Python . GIT, Mercurial, GitHub, Heroku . ;
• codepen.io – CodePen – front-end;

,

• www.librato.com – . ;
• www.google.com/analytics – Google Analytics;
• heapanalytics.com – iOS -. 5000 ;
• sematext.com/search-analytics – 50K , , , ;
• usabilityhub.com – « ». . . ;
• gosquared.com – 1000 ;
• mixpanel.com – 25000 200000, ;
• amplitude.com – 1 ;
• keen.io – , . 50000 ;
• parse.com – . ;
• www.inspectlet.com – 100 - ;
• www.mousestats.com – 100 - ;
• metrika.yandex.com – . ;
• www.hotjar.com – : 2000 , 3 , ;
• imprace.com – . . 5 ;
• baremetrics.com – Stripe;
• www.optimizely.com – A/B-, : 1 -, 1 iOS 1 Android;
• www.expensify.com – . .

API- SDK

• www.cognalys.com – , -. 70 50 . ;
• numverify.com – JSON. 250 API- ;
• sumome.com – . - ;

• www.braintreepayments.com – , Paypal, Venmo, Bitcoin, Apple. . $50 ;
• taxratesapi.avalara.com – , 10000 . REST API. ;
• currencylayer.com – . 1000 API- ;
• vatlayer.com – API . 100 API- .

• screenshotlayer.com – 100 .

, Docker

• quay.io – .

PaaS

• www.tutum.co – Docker DevOps: , - . -. , ;

, Vagrant

Vagrant

• atlas.hashicorp.com/boxes/search – HashiCorp;
• vagrantbox.es – .

• www.apichangelog.com – , , API (Facebook, Twitter, Google ).

Data Mining

• www.monkeylearn.com – . 100000 ;
• wit.ai – ;
• www.wolfram.com/language – . .

• github.com/httpsGithubParty/FOSS-for-Dev – ;
• github.com/pborreli/free-for-nonprofit – ;
• www.fullcontact.com/developer/pricing – , . 500 API- ;
• getawesomeness.com – GitHub.