Good Free Online Games?

Starknights is a classic online space rts/action game. There are dozens of browser-based space games out there but Starknights uses stand-alone client and is much better than any of those. You can find it at www.starknights.com
It was released almost ten years ago but it is still very addictive. You can produce different types of starships and create fleets, produce and put different components on your ships, colonise planets and build different buildings on them, use a market system. The strategic element of the game resembles Master of Orion and the action side of the game reminds of Star Control (two old classic space games from the 1990s).

America's Army
battleField Play4Free
BattleField Heros

Dungeons and Dragons online is free to play (mostly), then of course there is Runescape but that is not nearly as polished graphically.

Playing Online games are really fun...These games are easily buffered and easy to play...I love to Play Card Games Online and Driving Games. These games are played when ever you are free or feeling bored.

get on to steam theres a good half dozen decent ftp games. and theres also Arma II

A few more -

World of Tanks
Americas Army 3
Need for Speed Online
Global Agenda
Team Fortress 2
Battlefield heroes

Wow has gone free to play for the first 20 levels if you wanted to try it, Eve and Perpetuum Online have 2 week trials

Try A.V.A. (Alliance of Valiant Arms). It's nice too.