Redmine

Redmine is a self-hosted project management web application built on Ruby on Rails. It's designed for teams that need full control over their data and want a system flexible enough to fit different workflows, not just one opinionated way of working. It runs on multiple databases and operating systems, so it fits into most existing infrastructure.

At its core, Redmine handles everything a software or operations team needs to track work:

• Issue tracking with flexible role-based access control per project
• Time tracking so teams can log effort against specific tasks
• SCM integration supporting Subversion, Git, Mercurial, Bazaar, and CVS
• Gantt charts and calendars for visualizing schedules
• Wiki and document management built into each project
• Email notifications and feeds to keep everyone updated without manual check-ins
• Custom fields for issues, time entries, projects, and users
• Multiple language support, making it usable across international teams

Each project gets its own wiki, issue categories, and member roles, so large organizations can run many independent teams from a single Redmine instance without them stepping on each other.

Redmine has been around long enough to have a substantial plugin ecosystem, which lets teams extend it well beyond the defaults. If you're comparing it to something like OpenProject, Redmine trades a polished modern UI for a highly configurable, community-driven foundation that's been battle-tested across thousands of deployments.

It's a practical fit for development teams, IT operations, and project managers who want a proven, self-hosted alternative to hosted project management tools without paying per seat or giving up control of their data.