Open.money - Open is a connected banking platform for business payments that simplifies the process of sending, receiving, and reconciling payments for businesses.
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
Razorpay - Payment gateway solution for India with robust, developer friendly API and simple economic pricing.
TransferWise Business Payouts - The international payouts platform for businesses and banks.
PayU - PayU is another online payment service provider that offers fast and simple payment processes for merchants and buyers.
InvoicePlane - Free and open source invoicing application to host on your own server.