Allomani - Allomani is an E-Store with the shopping cart for online shopping websites, hosting & designing, Paid services, etc.
Google Pay - Make secure payments right through your Android device.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Cash App - The easy way to send, spend, bank, and invest.
Selz - Seriously Simple Selling
Venmo - Venmo is the best way to pay your friends. It's simple, fun and free to use.