SteerMouse is an advanced driver for USB and Bluetooth mice. It also supports Apple Mighty Mouse very well.
SteerMouse can assign various functions to buttons that Apple's software does not allow, including double-clicks, modifier clicks, application switching, assignment of shortcut keys, "snap to" cursor movement, which moves the cursor to target (such as an OK button), and more.
SteerMouse lets you control the cursor's Sensitivity on top of the Tracking Speed. (Apple's software only allows adjustment for the Tracking Speed.) By adjusting both configurations, you
What's New
Version 4.1.3b13:
* Supports Logitech G400.
Requirements
PPC / Intel, Mac OS X 10.4.3 or later
Download here