I already have good software installed for my Kensington trackball, so you'd think that an application like SteerMouse would be unnecessary.

However, if you have a third-party or wireless mouse, SteerMouse offers a core of features that can give you considerably greater ease of customizable cursor movement. But its greatest feature is hidden under the hood, and makes it worth twice the price.

Although I typically use key actions intead of a mouse, it's not an option all the time. SteerMouse animates the cursor so that it glides across your screen to the command pane. This action is so elegant that it should be a part of the Mac OS. Mouse and trackball-bound users will find that it cuts down on mouse usage significantly.

SteerMouse is easy to use and stays in the background. It was only when I accidentally trashed it that I realized what a pleasure it is to use.