Shoplink QuickBooks Desktop

Couldn't really use Shopify with my brick and mortar store with out this integration. This does require a phone call and screen share to set up but takes very little time and certainly is painless compared to trying to figure it out any other way.

I can update pricing, stock, and sales easily on a daily basis between my QBPOS and Shopify.

Worth a look if you are trying to operate a real store and online at the same time.