GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
TrackDuck - Visual feedback for web design and development.
Redmine - Flexible project management web application
Valist - Automatically created staging environments for every update with a shareable link for testing
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.