One Word Domains - Database of all available one-word domains
Brandpa - Domain names for startups
Handshake.org - Decentralized certificate authority and naming
DomainWatch - Domain Monitoring Made Easy
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!
Nuage - Nuage provides domain naming services.