Domainz.io - Premium domains, for not so premium prices
TestBox - Test drive your software options before you buy
Brandpa - Domain names for startups
Appsolite - Evaluating software is laborious, time consuming and riddled with a lot of guess-work.
Undeveloped - Domains you never thought were available
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.