Hedgewars on Google Code
Issue tracker - Feel free to post on our forums if you don't trust Google for whatever reason.
Hedgewars Forum is here
Hedgewars IRC channel
Development Mailing List
You can send emails to the official Hedgewars Development Mailing List where all developers and contributors can read your message
Important: you need to be subscribed to be able to post in the mailing list!
More info and public archives are available here: https://mail.gna.org/listinfo/hedgewars-dev