About OpenProject Git
OpenProject is open-source project and portfolio management software developed by OpenProject GmbH, founded in 2012 and headquartered in Berlin. It supports classic, agile and hybrid methodologies with work packages, interactive Gantt charts, Kanban boards, Scrum/sprint backlogs, time and cost tracking, document management and a wiki. The Community Edition is free for unlimited users and projects on self-hosted installs; the Cloud and Enterprise on-premises editions add premium features and support and start at $7.25 per user/month, with a 14-day free trial.

GitHub
GitLab.com
Bitbucket