Etsy Integration ‑ ShopList , 48 reviews
It's early days as I have only been using this app for about a week now but it seems to be doing what I want which is to share product sales and inventory between Etsy and Shopify. So far so good!
App is easy to use and any issues I had were handled by support quickly. My only issue is not all orders sync correctly so I have to manually change inventory so it updates in other platforms. But this has only happened a few times. Overall, one of the most user-friendly of the apps I use.