Flare by GoDaddy - Discover, give feedback and support startup ideas
Idealist - Volunteer, work, and intern job search
Wittycircle - Networking tool for entrepreneurs, makers and curious minds.
Idea Hunt - Solve specific challenges for your favorite products
Generating Product Ideas - Find ideas for your next business or side project
OpenVC - 2200+ VC firms by thesis to find 'best fit' for your startup