Redmine

4-dimensional Kanban board for Redmine. Organize issues across up to 4 simultaneous axes (columns, rows, and a nested matrix inside each cell) using any standard or custom field as a dimension. Zero additional database tables -- issues are your cards directly. Smart drag-and-drop with workflow enforcement, quick-create from any cell, native Redmine query integration, per-value colors with gradient interpolation, and foldable columns/rows.

No database migration. No external dependencies. Drop the folder, restart Redmine.

Site license: one purchase covers all your Redmine instances. $149 one-time, perpetual, no per-user fees.

1. Download the .zip from your account at makessensesoftware.com
2. Extract into your Redmine plugins/ directory (you should have plugins/board_plus/)
3. Restart Redmine
4. Enable the "Board+" module in Project > Settings > Modules

No database migration required. No external gem dependencies. No bundle install needed.

Docker users: extract into your mounted plugins/ volume and restart the container.