Aptana Studio

To easily edit web-related objects or files like javascript, CSS, XML and others, I use Aptana Studio.
It can even edit web-related objects inside Domino's NSF databases, using the Domino Developer Plugin For Aptana Studio. It reads those files, and displays them inside Aptana. So now you can edit them inside Aptana, and when you save them, they are saved in the NSF databases automatically.
Very helpful!