CodeShare.io - Realtime code sharing for developers
Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies
Code.gov - Share & reuse open source code from the Federal Government
Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
Code2Flow - An easy solution to create product flows.
edX - Best Courses. Top Institutions. Learn anytime, anywhere.