Create, browse and edit kanban-style boards. The board view supports drag & drop, optimistic updates, all the modals/forms are handled locally, and it's 100% Elixir. Create a board, then disconnect from the network and see how it behaves. It also demonstrates server synchronization via LLV's push_server_event mechanism - reconnect and open two windows side-by-side to see it in action. The source code is available here.