Flare by GoDaddy - Discover, give feedback and support startup ideas
Invision - Prototyping and collaboration for design teams
Wittycircle - Networking tool for entrepreneurs, makers and curious minds.
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Generating Product Ideas - Find ideas for your next business or side project
Craftwork - A collection of User Interface resources made by Craftwork