NameRobot Toolbox - All tools to create & check startup names in one place
BrandHunt V2 - Search/track domain & social media handles in real time.
Name Ideas Generator - A simplistic domain name generator.
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
NameMing - Get smart domain name suggestions using synonyms, suffixes, prefixes, short url, new gtlds to find the perfect domain name. Generate ideas for social user names and check availability for free!
Get.blog by WordPress - Prebook .blog domains before it's open to public