Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Gone - An ephemeral to-do list
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.
Streaks - The to-do list that helps you form good habits.
Listary - Listary is a revolutionary search utility for Windows
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.