The Embedded Entrepreneur Book - How to build an audience-driven business
Invision - Prototyping and collaboration for design teams
Startup Collections - Resources & tools for entrepreneurs, designers & developers
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.
Going Indie - A complete guide to becoming an indie software developer
Elevio - Learn how elevio can help bring all your support channels into one, to provide the best support possible for your users