Courseroot - Biggest online course database on the web
Startup Playbook by Hatch Quarter - A guide to building your startup
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
On Slack by Standuply - The most extensive book on using Slack to the utmost
Courses - Launch Online Courses on top of your Shopify store in 5 mins
CS183B - Startup Class - Stanford class taught by Sam Altman & guest speakers