Weird One Character Domain Superstore - Weird and available one character domain names
BrandHunt V2 - Search/track domain & social media handles in real time.
Handshake.org - Decentralized certificate authority and naming
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
Dictionary Domains - Unregistered dictionary word domains for your side project
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!