DAN.COM - DAN is on a mission to make unused domains accessible to all
BrandHunt V2 - Search/track domain & social media handles in real time.
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.
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
BrandBucket - The original marketplace for business names and creative domain names.
Zoho Social for Agencies - A single platform serving all your clients