Looking for offline alternative to Trello (Project Management Tool)

I've been using Trello to keep track of my tasks when working on a game. But I whish it were a bit more versatile in terms of coloring, icons etc (I have the browser addon installed) and it happened several times now that there were server issues (maybe it was my S***ty internet).
Since I'm making most games by myself, I was wondering if anyone could recommend me a good offline alternative? Free would be nice, but I'd also by something like 10-20$.

Thanks

 

I mostly use trello, but excel does the trick too.

 

Physical corkboard is an option.
Or a whiteboard with magnetic note holders.

 

I use an Asset from the store, Project Planner works rather well and all built into the Editor

 

Restyaboard is a very good open-source Trello alternative