TED – TED (Technology, Entertainment, Design) is an invitation-only event where the world’s leading thinkers and doers gather to find inspiration. In this website you will find all talks for free.
Khan Academy – Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more
Guides.co – Search the largest collection of online guides.
Squareknot – Browse beautiful, step-by-step guides.
Learnist – Learn from expertly curated web, print and video content.