Enjin

http://www.enjin.com/

Enjin is a web platform and social network for gamers, teams, clan websites and guild hosting, offering a free website with an online Content Management System, gaming user profiles, and social tools.

We give gamers the ability to create a unique identity with customizable websites, themes, profile widgets and social networking features to find others, communicate, join and discover other gamers, games and gaming communities.

Scumlabs

http://www.scumlabs.com/

Enjoy one of the largest collections of flash games on the internet. All the games are available for free, and we’re adding to our collection each day.

Meez

http://www.meez.com

At Meez, you can create animated 3D avatars, dress up the avatars, play free games and use the avatars in virtual worlds. Use your avatar as an AIM emoticon or export it into MySpace, Facebook and other sites.

TweetCraft

http://tweetcraft.codeplex.com/

TweetCraft can:

• Send/receive Tweets in-game (Immediate sending reloads your UI).
• Queue Tweets to send when it’s more convenient for you.
• Upload in-game screenshots using TwitPic.
• AutoTweet when you log in, enter an instance or get an achievement.
• Extensible so that AddOn authors can register messages or events to AutoTweet.