One Word Domains - Database of all available one-word domains
Handshake.org - Decentralized certificate authority and naming
Undeveloped - Domains you never thought were available
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!
Domainz.io - Premium domains, for not so premium prices
DomainPage - A dashboard for managing your domains