Startup Toolkit - Interactive how-to guides to launch your startup
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship
Tictail - Start your own online store, and also discover and shop for products you can't find anywhere...
AwesomeHunt - Community-curated lists of learning resources on any topic.
Content Marketing Stack - A curated directory of content marketing resources
Polotno SDK - Toolkit to create web design editors