Koding is an online development environment. Using koding we can develop a applications of C, C++, PHP, Ruby, Go, Java, Python and many more languages. Koding allows us to create application based on cloud means your code is available when you want.
Koding provide one Virtual Machine to each free users (more for premium users). It also provides a sub domain using which we can also test a web based application build in PHP, Python, Perl etc.
It has powerful shell and almost commands works on it. I am basically finding for any online tool which allows to execute almost bash commands, and i found koding.com and see more then i want!
I suggest if you want to develop web apps through koding.com
Click here to goto Koding.com