"OpenERP (previously Tiny ERP), a free software that
boost productivity and profit through data integration. It connect and improve
business processes; sales, finance, supply chain, project management, ..."
"ERP5 is an [open-source] full
featured ERP including customer relationship management (CRM), production
management (MRP), supply chain management (SCM), product design management
(PDM), accounting, human resources and e-commerce."