Projection mapping in a browser tab, for the people who need to map a wall tonight and do not have a licence for the software that usually does this. Shapes, video and web pages as layers, corner-pinned onto whatever surface they are being thrown at, with masks, snapping, ordering and undo.

The source can be a file, a URL, a webcam or a captured screen, and the output is a second window on the projector while the editor stays on the laptop. Workspaces save, a whole show exports as one file, and there is no server anywhere in it - it runs from a file on disk, which is what you want in a venue with no wifi.