
Habr, hello!
There are many good solutions from different specialists at odepen, and I think that the best of them should be collected in one place. Therefore, 2 years ago I began to keep interesting scripts on various topics on my computer.
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I used to post them in the cloud group IDE
mr product group
. Gefest , these were builds of 5-8 solutions. But now I began to accumulate 15-30 scripts in different subjects (buttons, menus, tips, and so on).
Such large sets should be shown to more specialists. Therefore I spread them on Habr. I hope they will be useful to you.
In this review we will look at multi-level menus.
Flat horizontal navigation
Beautiful navigation bar with a smoothly appearing submenu. The code is well structured, using js. Judging by the possibilities used, it works in ie8 +.
http://codepen.io/andytran/pen/kmAEyMaterial Nav Header w / Aligned Dropdowns
Adaptive link bar with two-column submenu. Everything is done in css and html. Applied css3 selectors that are not supported in ie8.
http://codepen.io/colewaldrip/pen/KpRwgQSmooth accordion dropdown menu
Stylish vertical menu with smoothly opening elements. Used transition, transform js-code.
http://codepen.io/fainder/pen/AydHJPure CSS Dark Inline Navigation Menu
Dark vertical navigation bar with icons from ionicons. Javascript is used. In ie8, it will most likely work without animation.
http://codepen.io/3lv3n_snip3r/pen/XbddOOPure CSS3 Mega Dropdown Menu With Animation

Stylish menu with two output formats: horizontal and vertical. Used icons and css3-animation. In ie8, it will definitely look awful, but in other browsers everything is cool.
Link to vertical:
http://codepen.io/rizky_k_r/full/sqcAn/Link to horizontal:
http://codepen.io/rizky_k_r/pen/xFjqsCSS3 Dropdown Menu
Horizontal menu with large items and a drop-down list of links. Clean and minimal code without js.
http://codepen.io/ojbravo/pen/tIacgSimple Pure CSS Dropdown Menu
Simple but stylish horizontal menu. Used font-awesome. Everything works on css and html, without js. In ie8 will work.
http://codepen.io/Responsive/pen/raNrEWBootstrap 3 mega-dropdown menu
Great solution for online stores. Displays several levels of categories and large images (for example, stock product). It is based on boostrap 3.
http://codepen.io/organizedchaos/full/rwlhd/Flat navigation
Stylish navigation bar with a smooth submenu. In older browsers will display problems.
http://codepen.io/andytran/pen/YPvQQN3D nested navigation
Horizontal menu with very cool animation without js!
http://codepen.io/devilishalchemist/pen/wBGVorResponsive Mega Menu - Navigation
Horizontal adaptive menu. It looks good, but the mobile version is a little "lame." Used css, html and js.
http://codepen.io/samiralley/pen/xvFdcPure Css3 Menu
Original menu. With simple and clean code without js. Use for wow effects.
http://codepen.io/Sonick/pen/xJagiFull CSS3 Dropdown Menu
Colorful drop-down menu with one level of nesting. Icons from font-awesome, html and css are used.
http://codepen.io/daniesy/pen/pfxFiCss3 only dropdown menu
Pretty good horizontal menu with three levels of nesting. Works without js.
http://codepen.io/riogrande/pen/ahBrbDropdown menus
Minimalistic menu with the original effect of the appearance of a nested list of items. I am glad that this solution is also without javascript.
http://codepen.io/kkrueger/pen/qfoLaPure CSS DropDown Menu
Primitive, but effective solution. Only css and html.
http://codepen.io/andornagy/pen/xhiJHPull Menu - Menu Interaction Concept
An interesting concept menu for a mobile phone. I have not seen this yet. Used html, css and javascript.
http://codepen.io/fbrz/pen/bNdMwZMake Simple Dropdown Menu
Clean and simple code, without js. In ie8 it will work exactly.
http://codepen.io/nyekrip/pen/pJoYgbPure CSS dropdown [work for mobile touch screen]
The solution is not bad, but there are too many classes. I am glad that there is no js.
http://codepen.io/jonathlee/pen/mJMzgRDropdown menu
Nice vertical menu with minimal javascript code. JQuery is not used!
http://codepen.io/MeredithU/pen/GAinqCSS 3 Dropdown Menu
A horizontal menu with additional signatures can decorate your site well. The code is simple and straightforward. Javascript is not applied.
http://codepen.io/ibeeback/pen/qdEZjRKVdKQJ (the author thought about the title for a very long time)
A beautiful solution with a lot of code (html, css and js). Invented 3 sub-format. For online stores, the solution is well suited.
http://codepen.io/martinridgway/pen/KVdKQJCSS3 Menu Dropdowns (special solution)!
Dark horizontal menu with thirteen (13) animation options! Be sure to advise you to read, useful in everyday life.
http://codepen.io/cmcg/pen/ofFizP.S.I hope you enjoyed the build of 23 solutions. If you want to continue to read them, then go below the survey.
All the pleasant work.