Frameworks alternatives to Bootstrap

Question

Worked a bit with Semantic UI, which seemed fine. But wondered if you have any other option of your preference, or recommendation among these?

https://www.agriya.com/blog/15-alternatives-bootstrap-foundation-skeleton/

I want to test options to CSS and Bootstrap.
Thank you.

Answer 1

MontageJS.
Groundwork
Gumby.
HTML5 Boilerplate. ...
Skeleton. ...
Bootflat.

Answer 2

Thank you, Godana. Are you currently using one of those?