What are some free cool online games?

I'm just wondering what free cool online games you play when you are bored?What are some free cool online games?
Runescape

Free Download-Runes Of Magic

Free Download-Vindictous

The downloads take a long while but they are worth it.
RunescapeWhat are some free cool online games?
ANNO1777 is an on line game that can be played straight from a browser like Internet Explorer or Mozilla Firefox.The game is an economical,political and military simulator.You will be a XVIII's century citizen.Virtual money can be exchanged into real money and back and the time spent in the game can become,gradually,very profitable.What are some free cool online games?
Some of my faves are

Portal flash

Minecraft (free version)

And if your into Console gaming, try downloading an emlater, as long as you have the system, its not illegal.
gameyao.com

gameapple.com

bebo