Product Hunt - A website that lets users share and discover new products
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
SaaSHub - Find and promote software that will help you grow your business or to be more productive.
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.
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.
Startup Buffer - Startup Buffer is a premium startup directory for emerging startups all around the world.