BillGrid.com - BillGrid is an easy to use online invoicing, billing and expense management system that will save you time with tracking clients projects, expenses, invoices and payments.
QuickBooks Online - QuickBooks Online is a Cloud Accounting for small business that can be used on iPad, mobile phone or computer to do invoicing, billing, run reports, or even pay employees online.
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Calxa - Calxa offers budgeting and forecasting solutions for small businesses and non-profits.
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.
Hubble - Hubble is an integrated reporting, analytics and planning suite designed specifically for Oracle and JD Edwards.