Tuleap

https://www.tuleap.org

Snippet from Wikipedia: Tuleap (project management)

Tuleap is an application lifecycle management system, which facilitates agile software development, design projects, V-model, Requirement Management, and IT Services Management. It is open source and released under the GNU General Public License, version 2.

Tuleap is an enterprise alternative to proprietary tools like CollabNet, Jira (and the Atlassian Suite) and Confluence, Crucible. On premise or in the cloud, Tuleap offers the most flexible and sustainable tool on the market.

The software is developed and maintained by Enalean, a French tech company founded in 2011 and headquartered in France.