Startup Toolkit - Interactive how-to guides to launch your startup
Startup School - How to start a startup, by Y Combinator
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship
Hyper Founder Program - An 8-week founder program inspired by Product Hunt
App Launch Checklist - Planning tool for launching your app successfully
Owlead - Grow your Twitter with valuable followers, effortless