GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Redmine - Flexible project management web application
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.
Bugzilla - Bugzilla is a "Defect Tracking System" or "Bug-Tracking System".
Bugfender - Cloud logging for your apps, not only crashes matter