Odoo is a suite of web based open source business apps.

The main Odoo Apps include an Open Source CRM, Website Builder, eCommerce,
Warehouse Management, Project Management, Billing & Accounting, Point of Sale,
Human Resources, Marketing, Manufacturing, etc

Odoo Apps can be used as stand-alone applications, but they also integrate
seamlessly so you get a full-featured Open Source ERP when you install several
Apps.

WWW: https://www.odoo.com