Games

POGO - probably the best overall game site on the web.

Midway Arcade: Old arcade games...play on line for free! (also see Triplets and Us )

RuneScape - Scape is the Web's most popular browser-based MMORPG (Massive Multiplayer Online Role-Playing Game). It has over 10 million members, most of whom play the game in its free incarnation. Gameplay: Point and click to run around, kill stuff, collect gold, and complete quests. Learning the game is easy. Mastering it can take months..

New Sand Game - this game is very addictive. Just click on the choices at the bottom (such as ground, sand, spout etc) and drag you mouse across the screen.

Double Wires - ever want to be Spiderman? This game is very challenging.

VectorBall - a very basic, but fun game.

Word Shoot - the faster you type, the longer you live.

GSN - a collection of online games. Includes "Throw the Book at OJ".

FreeWebArcade - more addictive games

Hero Arcade , GameSolo, LifeTime TV , MiniClip, Ultimate Arcade, New Grounds,  KewlBox, - various sites with online games