Fossil

OpenProject is a web-based open source project management platform for teams and organizations.

A lightweight software forge focused on scaling, federation, and privacy (fork of Gitea).

Flexible project management web application.

Trac is an enhanced wiki and issue tracking system for software development projects.

Tuleap is a libre suite to plan, track, code and collaborate on software projects.

Huly Platform is a framework for building business applications such as CRM, chat, project management, HRM, and ATS systems.

UVdesk Community is an open-source helpdesk system for building and customizing customer support portals and ticket workflows.

Octobox is a self-hostable tool for managing GitHub notifications with archiving, starring, filtering, search, and keyboard shortcuts.

Bugzilla is a free, open source, web-based bug-tracking system.

MantisBT is a web-based bug tracker for issue and project management.

Request Tracker (RT) is an open source issue and ticket tracking system for organizations to track tasks, ownership, and completion status.

ClearFlask is an open-source feedback management tool for collecting, organizing, and tracking product feedback and roadmaps.