Todoist, asana, Evernote, trello, etc etc. For a certain segment of society, services like these are perennially in demand, and there's always a new one promising a new twist that will actually keep you using it and transform your life.

Part of the ubiquitous demand for these services is because they're very useful, and partially it's because of how many people are sold on "productivity porn" and the idea that you can organize yourself out of being overwhelmed and ridden with FOMO anxiety (not on my high horse here: I've definitely been there).