Crowdstack - Curated directory of crowdfunding resources
Startup Toolkit - Interactive how-to guides to launch your startup
BackerTracker - Track crowdfunding projects and see how much they'll raise
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship
Attributer - Know what marketing channels are driving customers & revenue
AwesomeHunt - Community-curated lists of learning resources on any topic.