Doska

Doska is a free, open source kanban board app built around a Markdown editor. Every card is a Markdown document with syntax highlighting, task lists with completion counters, and a slash menu for quick formatting. The app is local-first: your boards live in the browser's IndexedDB, work fully offline, and sync to a destination of your choice — a local folder or a self-hosted server — shortly after every change, so the app never makes you wait on the network.

Boards cover the day-to-day kanban essentials: deadlines, priorities, card sorting, tags, assignees, file and image attachments, a cross-board deadlines view, an always-on-top quick note window, and an activity history. When you connect the sync server, Doska adds multiple user accounts, shared and public boards, live updates across devices, and single sign-on via any OIDC-compatible provider. An integrated MCP server lets AI clients such as Claude read and work with your boards.

Self-hosting is a one-line install script or a docker compose file that bundles the sync server, the web interface, and an optional Postgres database; attachments can be stored on the server or on S3-compatible storage. Unlike Trello, which hosts your boards in Atlassian's cloud and restricts things like attachment size and the number of open boards per workspace on its free plan, Doska keeps everything on hardware you control with no paywalled features — and folder sync means your cards remain plain Markdown files you can open in any editor.