Discussion board / Development tool

Hi community,

I have just launched my small community ownCloud server. I would like to create a subordinate group to admins called developers for friends that are more than users and care about proper functionality of apps, server etc.

Since the picoCMS is a great tool for site mico-blogging and development log, I am looking also for a tool that might be used as built-in a discussion board or idea exchange where the developers group could exchange ideas, prioritize them etc. Do you use anything from the offered apps for such purposes?

Opinions appreciated!