Namedat

Facts and stats about your name

Handlescout

Get notified when a Twitter username becomes available

The Social Brand Search Engine; Find out if your brand, user, or product name is available on over 500 social networks.

Fast and friendly way to find a usable name for your idea, app or business

All tools to create & check startup names in one place

See if your username is available on 100+ social networks

Tools and resources for naming things

make it easy, use one nickname for all your networks

Find out if your favorite username is available

Weird and available one character domain names

How unique is your username?