JS WARS is a classic shoot 'em up written to demonstrate the power of modern Web browsers. It is targeting Firefox 3.5 with its audio/video support and increased performance, and uses the canvas tag. It should work well in other modern Web browsers (supporting the canvas tag), just without the music and sound effects.
CloneRNX is a simple and funny game. It was cloned from the popular Facebook application called ChainRNX. While the original version of the game is a Flash application and it can be executed only within a Facebook account, CloneRNX is a Java desktop application that can be launched on any desktop system.
Blood Makes the Grass Grow Green (BMTG3) is a multi-player, side-scrolling, 1-dimensional strategy game that pits two people against each other in a duel over a stretch of land. Each player is positioned in a bunker at opposite ends of the map and tasked with deploying the right personnel and vehicles to capture FOBs (forward operating bases) and overrun your enemy's bunker. Currently there are 5 different units available. Timing, unit selection, and basic strategy are all necessary for success.
Whiteshoe is a text-based shooter game in which you explore a changing maze and complete your goals before the other players complete theirs or find you. It is based on the old game hunt, but was totally rewritten from scratch to use TCP packets and be more modular and expandable in design.
jOpenTTDLib is a Java library that polls OpenTTD servers for statistics on games in progress. This includes data on the map and how all the companies are faring. On top of this functionality, the games can be continually polled and game events are generated and listeners notified.