I really love Trello - free collaboration tool that organizes your project lists into boards. It’s so easy to use and all these boards look amazing on all devices. I still use Google Keep for quick notes or todo lists, but Trello is awesome for something more global, like a plan for new project or learning new language.
I also heard about Timeful. Have you ever used it? Do you have any similar tool you like?
Pic source: http://heartofwisdom.com/blog/get-organized-with-trello-lists/