Lean Service Creation - Open source design process and toolkit
Startup Toolkit - Interactive how-to guides to launch your startup
FeaturePeek - Collaborate on in-progress website implementations. FeaturePeek allows your team to collect feedback on your front-end during the implementation phase of development.
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship
Atomic - The fastest way to design beautiful interactions
App Launch Checklist - Planning tool for launching your app successfully