Mattermark - Ranking 800,000+ high growth Internet companies
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.
Startup Tracker - The startup search engine 🎯
Product Hunt - A website that lets users share and discover new products
The Org - Sharing org charts to make business more transparent
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