I am looking for a To-Do-List-Planer for my Laptop, so either a Desktop software or an online-software is what I'm looking for.
I've seen this things built in digital company infrastructure.
It's a to-Do-List with multiple columns, e.g. Private, Project 1, Project 2, Work 1, Work 2 etc. In each column you can create cards with your to-do-stuff but you can also create sub-tasks for a bigger task. E.g. if I have to do a big redesign for my company I would like to structure it in smaller tasks e.g. website, magazine, logo etc. with sub-tasks.
Most of the times you can also drag and drop cards from one column to another.
Anyway, I couldn't find any online planner that lets me create subtasks, and of course time it, which is also free.