A few months ago,
speaking of the plug-in market for commercial CMS ,
I casually mentioned the “assembly” of open site management systems. Despite the fact that I worked with many (behind a large number of projects of different scale on SharePoint, Bitrix, Yumi, Wordpress, Drupal, several “studio” and just samopisnyh systems), most of all, despite my gluttony, I like Drupal. Therefore, I will simply list several interesting assemblies on it, intended for various tasks.
Acquia
Perhaps the most famous assembly to date, developed under the leadership of the
Dries Buytaert . Acquia Drupal is the CMS Drupal distribution, supplemented by modules developed by the Drupal community and Acquia employees. In addition to the distribution itself, there is the Acquia Network service and
commercial support . The main scope of Acquia - the creation of “social” sites.

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Acquia is so popular that it is
recommended even by Microsoft (as well as several other CMS, for example Wordpress). Offer the installation of this system and individual hosters. From domestic you can call
SpaceWeb :

Drupalcampla
This assembly is essentially a website designed for the DrupalCampLA conference. The developers simply
described the process and laid out the result (note that the design will have to be supplemented - the graphics are not included in the theme). So, if you are preparing some kind of barkamp or conference, this assembly can be an excellent solution, allowing you to suggest a number of interesting ideas and significantly reduce the development time of the site.

Open atrium
Open Atrium is a good solution for building a corporate intranet. Included is a large amount of functionality - a blog, wiki, calendars, task lists, etc. I remember that in the spring I made a similar decision for one company, but here we have an excellent option that works out of the box and is free at the same time. Yes, there are a sufficient number of solutions with great functionality, but a) is it always really necessary? b) what is the cost of the solution? c) it is a drupal, an open system that you can freely expand.

ProsePoint
Drupal is a popular solution for creating news sites, and not only abroad, but also with us.
Drupal Newspaper And Journalism Showcase SlideshowProsePoint - an attempt to create a distribution that allows you to quickly and efficiently launch a news site. The recipe is quite traditional: a set of modules, selected for the task, created from scratch theme design.

In addition, there are many other installation profiles (say,
Uberdrupal ) and just dumps of projects developed for a specific task. The openness of the code and modularity allow you to find solutions for many of your tasks, and also to share your best practices.
PS I wonder how many minutes later the militant opponents will come running with shouts of “Drupal - shit”?
A source