Bill.com - Bill.com provides ACH payments processing, automates your accounts payable and accounts receivable processes.
Lydia Watch - Pay for things with one tap on your Apple Watch
ChargeDesk - ChargeDesk offers billing support across most of the payment service providers.
Apple Pay - Apple's secure way to make purchases in stores, apps and on the web.
Zoho Invoice - 100% free online invoicing software for small businesses.
Pay in apps with Venmo - Make purchases in apps using your Venmo account