Aptana is a IDE for developing Web 2.0 web sites quickly and easily. The key is to see what you are doing as you do it in the preview pane. Aptana requires JRE v1.4.2 and can be installed on Windows, Mac and Linux. It is also available as a Eclipse plugin with other IDEs to come.
- Errors and warnings across all 3 languages (code validation)
- Support for Mac (Universal Binary) and Windows with Linux coming soon
- Free and open source ” — Aptana FAQ
John Resig has been working with Aptana to improve the jQuery docs such that they’ll work better with their autocomplete api, so look for that in the near future.