MooShell is a web based utility which enables you to easily test your MooTools code. You can also write, test and run HTML, CSS and JavaScript code. Optionally, you can save your code for further usage and to share with others via a unique URL. It provides you with an update option to create a new version of your existing code. To choose the MooTools version, you can use the settings panel in the sidebar.

MooShell can come handy for programmers and developers to quickly test and debug code snippets before actually implementing them. This web application is light weight, free for use and does not require installation of any extra software.