Plane

Plane is an open-source alternative to Jira, Linear, Monday and ClickUp, aimed at teams that would rather not spend the week administering the tool itself. Work is tracked as issues, run in cycles rather than sprints, sorted through triage, and written up in docs that sit beside the boards. Kanban boards and gantt views come with it, and product roadmaps are managed in the same place. You can sign up on Plane Cloud or self-host the whole stack with Docker or Kubernetes; underneath it is Django and Postgres with a React front end. The project is AGPL-3.0 and has passed 56,000 stars.