FusionInvoice - Self hosted invoicing for freelancers and small businesses
Oracle NetSuite - NetSuite is the leading integrated cloud business software suite, including business accounting, ERP, CRM and ecommerce software.
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
FreshBooks - The ideal accounting software for small business owners.
Zervant - Easy invoicing, expense management, reporting, and customer feedback.
SAP ERP - SAP ERP is enterprise resource planning software developed by the German company SAP SE.