At least something very simple where you can search orders. Also, the ability to look up, create and send proposals would be great.

Simple app to send invoices for payments or have customers download the app to get order notifications and make payments or even to offer single design orders for new releases. Oh the possibilities are endless with this one. I'd love to send my customers who download the (White Label) app notifications of new releases, send them payment links, business updates like if our shop is on holiday break or special store hours, or sale hours. I could keep going on this one.