Dropdown with Multiple checkbox select with jQuery.
bootstrap dropdown hover menu
Pure CSS custom dropdown menu.
A dropdown menu with onclick trigger.
Just a simple dropdown using SCSS and jQuery.
Part of my Responsive Menu Concepts article on CSS-Tricks.
Stylish Custom User Settings Dropdown Menu with CSS
Tutorial from Treehouse Blog: http://blog.teamtreehouse.com/stylish-custom-user-settings-dropdown-menu-with-css
A better CSS3 only Dropdown menu
A dropdown with autoscroll.
Inspiration from http://codepen.io/hmps/pen/sGxJK
Animated, CSS dropdown menus
By CSSFlow: free UI elements and widgets coded with HTML5, CSS3, and Sass.
Need to know how to enable it? Go here.