Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Product Hunt - A website that lets users share and discover new products
AngelList - Access top deals through investor-led syndicates
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
Private Equity List - Private equity, venture capital database that focuses on growing sectors in emerging countries and contains contacts of investment professionals.
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.