CoinPayments - Payment gateway providing buy now buttons, shopping carts, and more to accept Bitcoin, Litecoin, and other cryptocurrencies/altcoins on your website/online store.
Bubble by V0LT - A self hosted, privacy respecting BitcoinCash store written in PHP
BTCPay Server - A free and open source server for merchants wanting to accept Bitcoin for their business.
CoinGate - CoinGate is a payment gateway for Bitcoin, XRP, Litecoin, Ethereum and 50 other cryptocurrencies.
Swiss Bitcoin Pay - Accept Bitcoin in your business.
ALFAcoins - A secure payment gateway for cryptocurrencies