Shortcat is a small macOS utility that lets you drive any app from the keyboard. Hit a hotkey and every clickable element on the current window — buttons, links, menu items, table rows — gets a short letter hint; type the hint and Shortcat clicks it for you. It works system-wide via the accessibility API, so it doesn't care whether the app is Mail, Xcode, Sketch, or a random Electron tool.

It's a long-running indie Mac app that's been around since 2014, originally from Maakaron and now maintained as a focused keyboard-driven navigation tool. The current version is a one-time paid purchase with a free trial, and runs natively on Apple Silicon. A natural fit for power users who like Vimium-style browsing but want the same flow across the whole operating system.