Windows only: Moving your mouse cursor across multiple monitors them all can be a long haul, especially in triple- and quad-monitor setups. Snap your mouse from screen to screen instead with keyboard shortcuts.
Multi-Monitor Mouse is a small application which, when triggered by a keyboard combination, snaps your mouse cursor to the next monitor in your multi-monitor setup. You can specify whether the mouse jump should be relative—having the cursor placed in the same relative position on the new monitor—or in the center of the screen. You can also specify the order of monitors the mouse will leap to, if sequential's not your thing. It takes a few minutes to get used to, but once you get the hang of this app, it's hard to imagine dragging your mouse across 3,000+ pixels again. Multi-Monitor Mouse is freeware, Windows only.