Mattermark - Ranking 800,000+ high growth Internet companies
Product Hunt - A website that lets users share and discover new products
Breakout List - A list of the fastest growing startups
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
Ennerate - Automated business valuations for 'Main Street' companies