Redmine - Flexible project management web application
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Zenkit - Zenkit is the home you always wanted for your ideas, your projects, your business.
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Taiga.io - An Agile, Open Source, Free Project Management System
RedBooth - Redbooth, the online collaboration software for team and task management. Be productive with project management tools like business chat and file sharing.