Ophcrack Live CD

http://utvv.blogspot.com/2008/05/how-to-fix-cpu-hog-quicksilver.html

Fix QuickSilver if it gets slow

Fix X11 to have active window follow mouseclick (from GIMP for OSX FAQ):

I must click windows to activate them before I can use them, is there a way I can spare myself all those clicks?

While Gimp and X11 are closed, open /Applications/Utilities/Terminal, and paste the following commands in it and press enter:

 

For MacOS 10.4 Tiger and MacOS 10.5 Leopard:

defaults write com.apple.x11 wm_ffm -bool false defaults write com.apple.x11 wm_click_through -bool true 

 

For MacOS 10.5 Leopard with updates from XQuartz:

defaults write org.x.X11 wm_ffm -bool false defaults write org.x.X11 wm_click_through -bool true

Get Vista's candy in XP