Strategoids

Strategoids is -currently- a 2d top-down space combat simulator using pseudo-newtonian physics. I eventually intended to turn it into a real-time strategy game, but have (temporarily?) abandoned it in favour of other projects.

Strategoids is written in Java, uses JOGL, and is licensed under the GPLv3. The sourcecode can be found on github.
Strategoids is -unlike most RTSes- a full simulation which can be sped up without any loss in simulation precision, and bullets can actually hit and miss (most RTSes simply roll a dice to determine if a bullet hit an enemy unit).
Strategoids uses pseudo-newtonian physics similar to the physics of Star Control 2 and Space War: a ship's thrust is handled properly (inertia!), but turning is instant and inertialess. I do however plan to make larger ships have inertia-enabled turning, though, primarily because their instant turning looks very silly.

A development version binary can be found right here.
Snapshot of the sourcecodes: strategoids-src.zip

In this development version, the player controls all of the white ships.
Undocumented controls for the development version:
Mouse scrolling: zoom/pan the map (similar to Google Earth and Supreme Commander).
1 to 6: spawn ships of various type and faction.
F1 to F8: change the speed of the simulation.