Checkvist, a checklist, task management and planning tool. I mainly use it for brainstorming and planning and its great. Been using it for many years now. Just

Checkvist, a checklist, task management and planning tool. I mainly use it for brainstorming and planning and its great. Been using it for many years now. Just wish the mobile experience was better (its too easy to accidentally move items on mobile), but they have a decent API, so maybe one day I'll hack one together that works how I want.