Odoo is an all-in-one modular business management suite offering ERP, CRM, eCommerce, and more, which can be deployed in the cloud or on-premise.
Odoo is a comprehensive suite of open-source business applications (ERP + CRM + CMS + eCommerce + more) designed to manage all major aspects of a business through a unified, modular platform. Originally launched as TinyERP in 2005, then renamed OpenERP and finally Odoo, it offers both a free/open-source (Community) edition and a paid Enterprise edition.