DHTML Ping Pong: Online version of Pong game with 4 ball speeds.
King Pong: 50's modern tiki culture reigns in this online version of the classic Pong arcade game, played against the computer. Requires Shockwave plugin.
Pong 2A: Simple Ping-Pong game using your mouse.
Pong.at: Contains Javascript version of Pong.
Soccer Pong: Shockwave version of the classic arcade game, with a soccer spin.
World of Justin: 3-D Liquid Pong: Three dimensional version of the classic game. [Requires Shockwave]