Product Hunt - A website that lets users share and discover new products
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
SimilarPages.com - SimilarPages has found and classified millions of interesting sites hidden due to low popularity with the goal of helping you discover and search a larger portion of the web
Startup Buffer - Startup Buffer is a premium startup directory for emerging startups all around the world.
TechStorey - Discover a new Tech Business at the click of a button