Alex Nicolaou's Space War
Contains Java based version of game, with instructions.
Spacewar
The original space combat game written to run as a Java applet.
Spacewar
Contains history, articles covering early development, Intergalactic Spacewar Olympics, code, influences, and game controllers, and Macintosh version of game.
SpaceWars
Peter Hirschberg and Josh Cogliati's C++ based version of game. Includes features, download of source, requirements, and screen shots.