Run Any Mac App Without a Dock Icon

I found this on the GetSatisfaction forum for EventBox

You can do this for any app without any extra software. It’s pretty easy.

1. Right click on the dock icon and select Show in Finder
2. Right click on the app and select Show Package Contents
3. In the Contents folder, open Info.plist in a text editor
4. Look for this line “LSUIElement” and change the following string value from 0 to 1.
5. Restart the app and it should appear without a Dock icon.

Note that you have to do this each time after updating the app.

Taken from: GetSatisfaction