This program allows you to dynamically change things like foreground color and size on an xterm.
Now, instead of restarting your xterm window repeatedly in order to get it set up in the manner you want, you can change it on the fly.
Tweak TextExpander to work the way you want it to in the preferences panel view it
Set up your preferences and even change the way Wikipedia looks! view it
Bing puts some control in your hands with its preferences panel view it
Tweak Yuuguu to work the way you want in preferences view it
See the stuff that's most interesting to you by customizing Digg view it
Making Google Reader behave the way you want it to view it