JIRA

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

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

Windshift is a self-hosted work management platform for teams, with boards, workflows, planning, tracking, collaboration, and customer-facing request intake.

ZenTao is an open source project management platform covering product, project, QA, documentation, organization, and office management.

Traq is a PHP-based project manager for tracking issues across multiple projects and milestones.

Flexible project management web application.

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.