InvertMouse is a simple, dirty tool that will invert your mouse buttons and not only.

What this program does is invert the entire mouse behaviour. So the left mouse button becomes the right, and visa versa, and moving the mouse to the right, will have the cursor move to the left, etc. To stop the program, simply press CTRL + TAB

Note: The program has no interface, so when you doubleclick InvertMouse, you won't even notice it started. Until you use the mouse.