DomainWheel - Smart startup name generator
DomainTyper - Domain Name Search that helps you to find available domain names. Search instantly as you type. Supports every extensions. Register your domain today!
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
Dynadot - Register your perfect domain name, hosting your website, and build your website all on dynadot.com! Each domain comes with a free 3-page site builder, so you can get started today!
Panabee - Best way to search domain names, esp for apps and startups
GoDaddy - GoDaddy makes registering Domain Names fast, simple, and affordable. Find out why so many business owners chose GoDaddy to be their Domain Name Registrar.