Square
Square is a Point of Sale solution for small to large business'. They offer a register, a terminal, and a reader. The register is a fully fledged PoS system, the terminal is similar to an eftpos machine, and the reader can be paired with a mobile device turning it into a card reader and sales device. It also features sales analytics through the web and online payment options.
To find out more about this payment system you can visit their website here.