SlapWindows

The premise of smacking your laptop and hearing it shriek back is exactly the kind of nonsense I didn't know I needed until now, and SlapWindows actually delivers — seven voice packs including Yamete, Gentleman, and Goat give it real range depending on whether you want something elegant or deeply unhinged, and the USB Moaner mode that triggers when you plug or unplug a device is the type of detail that turns a one-note novelty into something you'll actually use. Four dollars for a lifetime license with updates included and no dock icon clutter means this stays low-key until you're ready to strike, which is honestly the move for office prank potential.