This looks interesting. An open-source IDE for creating Web 2.0 type applications. When I have time I’ll download the Mac version and have a look. See Aptana. From the web site blurb:
Aptana is a robust, JavaScript-focused IDE for building dynamic web applications. Highlights include the following features:
- Code Assist on JavaScript, HTML, and CSS languages, including your own JavaScript functions
- Outliner that gives a snapshot view of your JavaScript, HTML, and CSS code structure
- Error and warning notification for your code
- Support for Aptana UI customization and extensions
- Cross-platform support
- Free and open source. (Source available soon)