Invision - Prototyping and collaboration for design teams
Dotarchy - Pick a topic, discuss it, make some Friends
Commenze - Fully customizable comment sections for any website
Start on Android by Google - Developer program to optimize your app before you launch
The Embedded Entrepreneur Book - How to build an audience-driven business
zipBoard - ZipBoard is a web-based visual bug tracking & issue tracking tool that helps developers, testers and project managers collaborate during website and elearning development.