What markup template for the admin section would you recommend, for example on twitter bootstrap?

Question

Themes

There are many, many admin templates. For example, on twitter bootstrap. There are so many that I can't choose.
Well, for example
https://quickadminpanel.com/blog/10-best-free-boot...
There are hundreds of them if you search.
I need - simple, easy, fast, free. And unforgotten. With the source code on github or somewhere else. You can on twitter bootstrap. Maybe on something else.
What do you advise?

Answer 1

And what did AdminLTE not suit?