Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Streaks - The to-do list that helps you form good habits.
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.
Taskful - Deadlines, meet your match.
Listary - Listary is a revolutionary search utility for Windows
ToDoList - Windows desktop application to stay on top of your daily tasks.