Free Games

HeyBingo.com

Several free-to-play online bingo games. Flash-based (no need to download), chat, support, many bingo game patterns.
http://www.heybingo.com

Distraction
Hard to explain this, you're a sort of cooked chicken trying to avoid missiles.
http://www.tokenarcade.com/play-575-Distraction_Game.html

Sleuth Noir
Sleuth is an open-ended, detective role playing game (RPG) where you solve mysteries by searching for clues, questioning suspects and interviewing witnesses. There are lots of unique Mysteries.
http://sleuth.hypotheticalsoftware.com

Mini Pool 
A good pool game for you to play, one of the best, very realistic.
Mini Pool

Tower Defence
Try to defend your tower against invaders a classic game.
http://tower-defence.com/

The Last Soldier
This arcade game takes a bit of getting used to but worth it eventually.
http://the-last-soldier.freeonlinegames.com

Cubefield
Dodge the cubes, sounds easy, starts off easy, gets harder,
just watch and try to dodge as the cubes keep getting faster.
http://js.pp.sohu.com/ppp/blog/widgets_0914/game/3dcube.swf

Extreme Dodgeball
Great fun to play but you will need quick reactions for this.
http://www.games.com/game/extreme-dodgeball/

Belles Beauty Boutique
Own your own boutique and chat with lots of other people realtime.
http://www.games.com/game/belles-beauty-boutique/