This extension allows you to collect online payments through the Square payment gateway.
Square accepts all major debit and credit cards. (Available in the U.S, Canada, Australia, UK, and Japan.)

Benefits of using Square Payment Gateway

• Simple pricing: 2.9% + $.30 (2.9% + $.30 for CA, 2.2% for AU, 2.5% for UK, and 3.6% for JP) for online transactions.
  They also provide custom rates available for some businesses with annual revenues over $250K and the average ticket size of over $15.
• Fast deposits: Your funds get deposited to your account within one to two business days.
• PCI-Compliance: Square provides end-to-end encryption and PCI-DSS compliant payment processing with no PCI or security fees.