GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
Oracle NetSuite - NetSuite is the leading integrated cloud business software suite, including business accounting, ERP, CRM and ecommerce software.
Synder - AR Automation
FreshBooks - The ideal accounting software for small business owners.
Xero - Xero is online accounting for your small business.
SAP ERP - SAP ERP is enterprise resource planning software developed by the German company SAP SE.