I\'m trying Aptana3 but I don\'t find an essential feature :
Remove trailing whitespaces/empty lines on save.
This is now possible.
Preferences -> Aptana Studio -> Editors
Check "Remove trailing whitespace characters"
Works fine with this Eclipse plugin http://andrei.gmxhome.de/anyedit/ Tested with Aptana 3.0.7
Not possible with Aptana 3.1. See
But since Aptana is (was?) based on Eclipse, you can also try