It's a browser-based JavaScript object logger and inspection tool - similar to Firebug. NitobiBug runs across different browsers (IE6+, Safari, Opera, Firefox) to provide a consistent and powerful tool for developing rich Ajax applications.
JavaScriptMVC is a framework that brings methods to the madness of JavaScript development. It guides you to successfully completed projects by promoting best practices, maintainability, and convention over configuration.
Pi is a javascript library designed for javascript programmers.The goal is to provide an useful development environment and minimize the browser differences.H
Converts source code to formatted text with syntax highlighting. Coloured output in HTML, XHTML, RTF, TeX, LaTeX and XML format. 120+ programming languages. Platform independent. Notepad++ plugin available.
Xinha (pronounced like Xena, the Warrior Princess) is a powerful WYSIWYG HTML editor component that works in Mozilla based browsers as well as in MS Internet Explorer. Its configurabilty and extensibility make it easy to build just the right editor for multiple purposes, from a restricted mini-editor for one database field to a full-fledged website editor. Its liberal licence makes it an ideal candidate for integration into any kind of project.