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 Buddy - Generate Relevant Usernames when your 1st choice is taken.
Handlescout - Get notified when a Twitter username becomes available
Couple Name Generator - Couple Name Generator combines two people?s names into the unique supercouple name