WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.

Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.

Thirty Bees - Open e-commerce platform designed to work out of the box.

Open.money - Open is a connected banking platform for business payments that simplifies the process of sending, receiving, and reconciling payments for businesses.

Squarify.io - Sync inventory between Square and Shopify.

Stripe iOS SDK - Accept both Apple Pay and credit card payments easily on iOS