Here's something I did recently, mainly because I needed a change from working on my current (yet unannounced) project. Created during a few hours at night, I present to you Kong, my take on the Pong genre (version 0.1).

Here's the download: Kong-0.1.zip
You need Java to run it, everything else should be included in the package.
Source code is also available: http://repo.or.cz/w/kong.git

Instructions: Left player is controlled with W and S, right player with up and down. Appoint a third player to count the score.

A word of warning: As I said, this was written within a few hours. Don't expect too much.
I have quite a few ideas for improvements, but no promises here. Maybe I'll extend it in the future, maybe not.