Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Angee - One simple solution to protect your home and privacy
Listary - Listary is a revolutionary search utility for Windows
Homeboy - The world's most accessible security system
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.
Synapse - Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of the Zeitgeist engine.