Haptiker is a native macOS menu bar app that turns the edges of your Mac trackpad into controls. Right edge: slide to set volume, tap to mute. Left edge: slide to set display brightness, including external monitors. Top edge: slide to set keyboard backlight. Bottom edge (opt-in): flick between recent apps. 7-day free trial; $4.99 one-time. Runs on macOS 12+, Apple Silicon and Intel. Made by FelixWeb (https://felixweb.site).