What are some alternatives?
BrandHunt V2 - Search/track domain & social media handles in real time.
namegrep - Domain name search with regular expressions and curated sets
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
NameMesh - 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!
Undeveloped - Domains you never thought were available
NameBounce - NameBounce is an intelligent domain name and business name generator. Discover hundreds of new business name ideas with available domains, all for free!