GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.
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.
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
FeaturePeek - Collaborate on in-progress website implementations. FeaturePeek allows your team to collect feedback on your front-end during the implementation phase of development.