Thinboard is a minimalist implementation of a Kanban board and to-do list manager. The design prioritizes compactness, readability, and speed of operation. It supports multiple boards with near-instant switching between them, and includes an undo/redo functionality for 50 revisions per board. It operates completely offline; data is exported to or imported from plain text files in JSON format. The application is built as a single HTML file containing jQuery and web fonts, packaged as an NW.js application.