Flare by GoDaddy - Discover, give feedback and support startup ideas
Find A Maker - find a partner for your next project
Wittycircle - Networking tool for entrepreneurs, makers and curious minds.
CoFoundersLab - Meet 250,000+ entrepreneurs online
Little Inventors - Turn children's ideas into reality
Y Combinator Co-founder Matching - YC’s free online platform to help you find your co-founder