In its latest 1.61 version, holding the command key before running the app will bring up the preference pane where you can customize RightZoom. This is where you can add or remove entries from your white or black list. Clicking on the plus button will list all your running apps that aren’t already added to the list, while clicking on the minus button will remove an entry currently selected in the list.
Here, you can also specify how RightZoom behaves. You can allow full screen maximization only when the Option/Alt key is pressed, allow the usage of a customizable hotkey, or disable RightZoom altogether and make it function only when a hotkey is pressed. Furthermore, the default Option/Alt + Command + E hotkey can be customized.
RightZoom comes with a guide as a PDF file explaining how the app works, its limitations and its bugs and other additional details.
RightZoom is a background process utility and runs using very minimal resources. It does not slow your system down at all when you have it running.
Whenever you wish to quit the process once you've already run it, you can simply launch Activity Monitor and quit the process or type killall RightZoom in Terminal. Also, if you want RightZoom to load every time you turn on your Mac, you can simply drag the application in your Login Items list and you should be set.
RightZoom is free and distributed by BlazingTools Software. It can also be found in MacUpdate.com. Its last update was March 27, 2009, and it requires Mac OS X 10.4 (Tiger) or later. Its file size is a small 416KB download. Just drag the app to your Applications folder to install, and drag the app to your trash (or your favorite app uninstaller) should you wish to uninstall.