Ardus: A Robot Battle editor.
Robot Battle Contest Archive: A list of upcoming, ongoing, and gone Robot Battle 1.4 contests and some Robot Battle related links.
Robot Battle Development: Source and development notes.
Robot Battle Official Site: Downloads, screenshots, mailing list, history, and current contests.
Robotbattle.tk: Home of the REC, T4 and AILO contests. Also hosts Robot Battle's IRC channel.