GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Bugfender - Cloud logging for your apps, not only crashes matter
Redmine - Flexible project management web application
Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Marker.io - Visual feedback and bug reporting tool for websites