All Signs & Graphics Inc

The best custom products app by far. I've tried them all and have DPO installed on 2 sites now. The customization options available to you with this app combined with first-class support, your only boundaries are your own imagination.

This app is super helpful, filling all the holes left open by shopify. Basic things that you think you should be able to do easily, but can't on shopify, Mechanic has a task for that.