http://codiad.com
https://floobits.com/
https://www.nitrous.io/
https://squadedit.com
https://c9.io/
http://codr.cc/
http://stypi.com/
http://collabedit.com/


for sublime text
https://github.com/Floobits/floobits-sublime
intelliJ offical
http://www.jetbrains.com/idea/features/ide_talk.html
can be implemente into own server
http://codiad.com