A Kanban board is a way to visualise your work and help you get more work done. You organise your work into tasks that need completeing and use the board to show the state of each card. Kanban encourages you to get work finished before starting new work.
The amazing Emacs Org-mode can be used to create a very fast and easy to use Kanban board that is with you where ever you are.
Update: Using Org-mode doesnt give me everything I want from a Kanban board, but it was an interesting exersice. For now, I am just sticking to my list view of a Kanban board.
Org-mode is built into Emacs / Spacemacs so there is no need to install any packages or layers for any of the following.