SoundRTS is a real-time strategy audio game. The recommended version is 1.3.8.1 (Windows only).
Mailing list: soundRTSChat. Forum: AudioGames.net. Blog: SoundRTS development log. Email: SoundMUD hat gmail dhot com.
Source code: Github.
Old versions (interesting versions: 1.0, 1.0.1, 1.1.1, 1.2-a9)