Scrawl - Scrawl is a notes taking and memo app that lets you keep track of the things that are important for you, like daily routine tasks, projects, reminders, calculations, or accountability of someone.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Pystickynote - Stickynotes for your desktop easily from the command line.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Stickies - Stickies is a PC utility written to replace Post-It-style notes left stuck to your monitor.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.