Kanboard

Kanboard is a free, open-source Kanban project management application built in PHP. It focuses on simplicity and a clear visual overview of work, organizing tasks into customizable columns on a drag-and-drop board.

Key capabilities include work-in-progress (WIP) limits, subtasks, attachments and comments, advanced search and filtering, automated workflow actions, and an analytics view for project metrics. It supports multiple authentication backends (local accounts, LDAP, OAuth2), 30+ interface languages, and stores data in SQLite, MySQL, or PostgreSQL.

Typical use is as a lightweight, self-hosted board for individuals and small teams who want to track tasks and projects without the overhead of heavier tools. Its plugin system and JSON-RPC API allow integration with other systems and custom extensions.