What programs do you have freeze up often?

I am working on a task manager program and it is made to kill processes that don’t dies with the regular windows task manager. It works like a charm, but I want to expand the range of programs that everyday people have freeze up. What are some programs that freeze up for you?

Right now it has:
explorer.exe basically reboots your desktop gui
itunes
internet explorer
firefox
windows media player
quicktime

You see, there are sometimes applications that don’t quit even when you use the task mamanger, because other processes related to them are still runing. This kills the entire process tree. The application has no choice but to quit and does so immideatly. This is made for people who might not know how to find the process and end the process tree.

Plus, I am bored.