Odoo

Odoo is a full suite of business applications, of which project management is just one. Odoo is a multiplatform solution, supporting Windows, several Linux distributions, and other operating systems as well.

The community edition is, of course, free and open source, but limited in features compared to the enterprise version. Odoo project management has some interesting features, such as Gantt charts, a Kanban view, tasks and issues, graphs, and more. Notable assets are the community resources, and its official Docker image.

Odoo is licensed under GPLv3, and requires Python and PostgreSQL. Its latest release, 9.0, is available for download and as source on GitHub.