The CDT (C/C++ Development Tools) Project is working towards providing a fully functional C and C++ Integrated Development Environment (IDE) for the Eclipse platform.

Put a quick front-end on a db backend using Django

Nevow is a web application construction kit written in Python.

FireBug is fairly simple - it adds a console to the bottom of every web page in Firefox. The console will display all Javascript errors that occurred for the page you are looking at, and objects or text that have been logged from various places

Javascript-based online code highlighter

python rails competitor

Library for building rich AJAX applications (drag-and-drop, etc..)

State and substate design pattern

Graph of job demands for various programming languages