Odoo is an all-in-one business management suite of mobile-friendly web
apps that integrates everything you need to grow your business: CRM,
website content management, project management, human resources,
accounting, invoicing and more. Odoo apps integrate seamlessly to
provide a full-featured open source ERP, but can also be used
stand-alone. Python programmers can develop their own app modules, or
choose from an array of free open source such as those provided by OCA;
or paid commercial ones.