Shards : A free and modern UI toolkit for web makers based on the popular Bootstrap 4 framework.
Kickstrap : Twitter's Bootstrap with themes, apps, and other enhancements
PaintStrap : Generate beautiful Twitter Bootstrap themes using the Adobe kuler / COLOURlovers color scheme
IcoMoon : IcoMoon is an icon solution, providing three main services: Vector Icon Packs, The IcoMoon App, and an Icon Delivery Network.
Genericons : Genericons are vector icons embedded in a webfont designed to be clean and simple keeping with a generic aesthetic.
Use genericons for instant HiDPI, ...
Font Awesome, the iconic font designed for use with Twitter Bootstrap. In a single collection, Font Awesome is a pictographic language of web-related actions.