My Weekend Project: Things Done Later

Also, perhaps displaying the due date and changing colors if it's past due / about to be due might be a good idea. For instance, the day before change yellow and the day after change red?

When things are selected as done, the next day pushing them into an "Archive" list similar to how Things does it might also be cool.

Suggestion: lose the windows, lose the pop-up for each task; I found it takes too many clicks.