DAN.COM - DAN is on a mission to make unused domains accessible to all
Domainz.io - Premium domains, for not so premium prices
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.
DomainWatch - Domain Monitoring Made Easy
BrandBucket - The original marketplace for business names and creative domain names.
Newsy - Monetize your un-used domains and turn them into your own content aggregator with 0 code!