Cloudd9.com is one of the most powerful and popular online code editors to write, run and debug your code. The editor also allows you to keep your work private or make it public in order to collaborate with other developers in your circle. Cloud9 makes developing much faster and testing extremely easy.
Nitrous.io is a modern and lightweight online code editor with supporting for over 90 languages. You can run cashes, databases and webservers straight from your web browser including Windows, OS X, Linux/Ubuntu and Chrome OS. Similarly, it supports almost all of coding languages such as Ruby, Python, Java, PHP, HTML 5 and CSS etc.