DebugMonitor provides a simple API to allow BeOS applications to display their state and progress on a separate monitor application. This means you can watch what is going on in your application as it is running.
LOLCode IDE plugin for Eclipse. LOLCode is a new humorous language designed to teach those new to programming, and to be enjoyed by the rest of us. This plugin does syntax highlighting, code folding, debugging and content assistance.
This debugger for PHP gives you the ability to inspect and understand what is going on in your application.