Trello is the perfect to-do list except for one thing: it doesn’t offer checkboxes. Tasks for Trello is a free Chrome extension that fixes that.
Install this browser add-on and you can toggle checkboxes on and off for any Trello board. Check something and the title will be crossed out and greyed, as shown above.
This is something Trello should have added themselves years ago, and I bet they still will someday. If you don’t want to wait, however, give this simple Chrome extension a shot—it works exactly as you imagine. I only wish checked items could be automatically archive, but maybe in a future version?