Odoo

Odoo provides a suite of web‑based business applications that can be installed on‑premises or run in the cloud. The core modules include customer relationship management, website building, e‑commerce, inventory and warehouse handling, project tracking, accounting, point‑of‑sale, human resources, marketing, and manufacturing. Each app can operate independently or be combined with others to form a complete open‑source enterprise resource planning system.

The software targets organizations of varying size—from micro‑businesses to large enterprises—that need an integrated platform for managing sales, finance, operations, and employee activities. Developers can extend functionality through a large collection of community‑contributed modules and by creating custom code, with all data stored in PostgreSQL.

Odoo is released under the LGPL‑3.0 license, is self‑hostable, and offers a free community edition that includes all core apps. Its open‑source model encourages contributions from a global developer community and allows users to retain full ownership of their data and source code.