WYSIWIG conditional compilation preprocessor for Java etc.
...Being WYSIWYG, the PreprocessorWizard multi-language WYSIWIG preprocessor resolves the problem of code being difficult to read and allows one preprocessing syntax for all languages. It is easy to use as a standalone application and it can be easily integrated with almost any IDE.
Interactive Environment for Coffee-Script, Jade and Stylus
LiveCoder helps you to play with Coffee-Script ( Language that compiles to JavaScript) , Jade ( Popular Node.js Template Engine), and Stylus CSS pre-processor.
This is not a IDE or any Development Environment, This just helps you to effectively learn these languages.