[abalone]

Dumb question maybe but why is Bootstrap (from Twitter) not on this list? What are the inclusion criteria?

[manigandham]

It was originally my list of interactive frontend component libraries that I now keep track of here: https://gist.github.com/manigandham/34154e63dc3c1b8747fab40d...

If you want style guides and design systems then the link by "oedmarap" is much better.

[cseelus]

They don’t use it anymore

https://www.quora.com/What-CSS-framework-does-Twitter-use-in...