Instant Username Search - Check out if your username is available
Name Generator - Generate original names using Markov chains.
Namechk - See if your username is available on 100+ social networks
Username Ideas - Need username ideas? Username generator helps you to create a unique nickname for social networks, media, email, games or whatever you want.
Handlescout - Get notified when a Twitter username becomes available
Username Buddy - Generate Relevant Usernames when your 1st choice is taken.