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)
Get it at www.aptana.com