Shopify Tap & Chip Reader - Mobile POS hardware that connects to the rest of Shopify
Shippn - Shop from 25+ countries that don't ship to your country.
Stripe Terminal - The programmable point-of-sale solution 💳🛠️
Ship.com - Package shipping & tracking app for mobile.
AutoSync for Shopify - Sync your inventory levels between Shopify and Square
Uber - Uber is a website and mobile app that allows you to get a ride similar to a taxi service from your phone.