This is a quick and somewhat cobbled-together script that perpetually tweaks due dates on Wunderlist tasks, so they never come up as overdue. I've done this as an alternative to tasks that recur from their due dates, as Wunderlist doesn't support this natively. Also, for recurring tasks, having a list of overdue tasks isn't as motivating as having a list of tasks that I could do today.

I'm running this on Heroku, through the scheduler add-on. It seems to work well enough for my purposes, and it's hard to argue with "free" as an operating cost.

If you particularly want to use this for your own stuff, I'm not going to stop you, but I make no promises that this will keep working, or that it won't somehow break your data, or start deleting things, or other horrible stuff.