websites for learning a new skill

1.  https://www.edx.org/
2. https://code.org/
3. https://www.coursera.org/
4. https://coursmos.com/
5. http://gohighbrow.com/
6. https://www.skillshare.com/
7. https://curious.com/
8. https://www.lynda.com/
9. https://www.creativelive.com/
10. https://www.udemy.com/
11. https://www.codecademy.com/ 
12. https://www.codeplace.com/
13. https://www.udacity.com/
14. https://courses.platzi.com/
15. https://www.sitepoint.com/
16. https://www.codeschool.com/
17. https://www.datacamp.com/
18. https://www.dataquest.io/
19. https://www.chesscademy.com/ 
20. https://ml.manash.me/
21. http://www.gizmodo.com/
22. https://www.pythonsheets.com/
23. https://commonsware.com/
24.  https://www.overleaf.com/
25. http://www.howtocode.com.bd/ 
26. http://docs.oracle.com/javase/tutorial/java/ 
27. http://devdocs.io/
28.  data structure and algorithm in java