Flare by GoDaddy - Discover, give feedback and support startup ideas
Product Hunt - A website that lets users share and discover new products
Wittycircle - Networking tool for entrepreneurs, makers and curious minds.
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
Generating Product Ideas - Find ideas for your next business or side project
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.