Pong

DHTML Ping Pong
Online version of Pong game with 4 ball speeds.
http://www.geocities.com/norton_innocent/DHTMLPingPong/PingPong2.htm

HTML Ping Pong
Simple Ping-Pong game using your mouse.
http://www.act02.com/ping_pong/index.html

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.
http://www.kingpong.net/

PONG!
Single-player Pong game using Java.
http://pong.zumzum.net/

Pong.at
Contains Javascript version of Pong.
http://www.pong.at/