Allomani - Allomani is an E-Store with the shopping cart for online shopping websites, hosting & designing, Paid services, etc.
Cash App - The easy way to send, spend, bank, and invest.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Facebook Pay - Send money to your friends via Messenger
Selz - Seriously Simple Selling
PayPal.Me - Request money using your own personalized URL.