Paymo - Manage projects, track time, create invoices, and get paid online.
Odoo - An all-integrated business app suite to unleash your growth potential.
Wave Financial - Award-winning financial software designed for entrepreneurs.
ERPNext - The ERP Software that helps you take full control of your business. ERPNext is both powerful and easy to use.
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
Adempiere - ADempiere is a commons-based peer-production of Open Source ERP Applications.