Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
fzf - A command-line fuzzy finder written in Go
Listary - Listary is a revolutionary search utility for Windows
fzy - A better fuzzy finder
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Percol - OS & Utilities and Development