FreshBooks - The ideal accounting software for small business owners.
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Bill.com - Bill.com provides ACH payments processing, automates your accounts payable and accounts receivable processes.
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.
AND CO - AND CO helps freelancers, entrepreneurs and other small businesses run their business smarter.
Elorus - A super-easy online invoicing & time tracking software