I recommend using this software for those who want to program :
Codiad => http://codiad.com
Cloud9 SDK => https://github.com/c9/core/
Installation Instructions : https://medium.com/@chintanp/using-cloud9-3-0-ide-on-raspberry-pi-954cf2d6ab8e#.9gilmqjog
ICEcoder v 5.0 free => https://icecoder.net/downloads
I have looked for other webides but are either very complicated to install either do not work .
the best and the lightest WebIde is Codiad
The most powerful is Cloud9