The Unix underpinnings of Mac OS X allow users to assign priorities to processes with the Renice command. Higher priority processes get more CPU time and vice versa. The downside is that you have to use the terminal, and you have to know the renice syntax, process ID's, etc. Wouldn't it be nice to automatically adjust application priorities on the fly? Renicer is designed to run in the background, and automatically prioritizes whatever application is in front. It also ups the priority of the Finder, Dock, and Window Server. Renicer is designed to be simple enough for novices, yet flexible enough for the power user.