fzf - A command-line fuzzy finder written in Go
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
fzy - A better fuzzy finder
Listary - Listary is a revolutionary search utility for Windows
Percol - OS & Utilities and Development
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.