Some learning sites based on categories.
1. Online Colleges and Universities (wide variety of field / courses)
- edX
- Cousera
- Open Yale Courses
- Khan Academy
- Harvard Extension School
- Open Learning Initiative
- MIT Open Courseware
-HTML Dog
-Hack Design
-Skillcrush
-HOW Design University
- Apple Developer Site
- Google Code
- Code.org
- Udacity
- CodeHS
- Mozilla Developer Network
- Cousera
- Tutorials Point
- Learnable