what system is using on askubuntu.com website

Question

I'm interested about " askubuntu.com " website construction.
Does anyone know what CMS " askubuntu.com " is using?

I tested so many A&Q website system before, but "askubuntu" is one of the best sites for Answer and Question I have seen.

Answer 1

There is a list answer on SO Meta that describes the benefits and disadvantages to many of the SO clones.

Here is the specific question for which you are looking on SO Meta

Answer 2

Check out:

This site is for meta-discussion of the Stack Exchange family of Q&A websites