which q&a system is more active? osqa, askbot, cnprog ...etc?

I want to pick one of these system and go with it, which one is better in terms of bug fixed and active development?

Hello,

Cnprog appears to be inactive, but is still strong in the form of askbot. OSQA is also a clone of CNPROG. I am not sure how active is osqa development, seems to have slowed.

In terms of bugs fixed Askbot is the best (from the three you've mentioned), I keep bugs out by writing test cases for every new feature.

You can monitor project activity and history here: http://github.com/ASKBOT/askbot-devel/network. Besides my own there are some contributions by several other people - mostly translations at this point, but forks are welcome.

Other projects that I'd mention are Shapado (Ruby/Rails) and Question2Answer (PHP). Maybe there are other decent ones, but I don't have time to research - who will tend to askbot then :)?

Thanks.