Massive collaborative multiuser painting and drawing canvas developed in AIR. onBoard is massive collaborative painting and drawing canvas where you can draw, sketch, paint, zoom, rotate, screenshot or post your drawing to facebook. See other users drawing live. Use one finger to move canvas or two fingers to zoom and rotate. Zoom in to maximum and drawing tools will appear. Select your tool, choose size and color and draw the largest drawing the world has ever seen! Anyone can draw anywhere in canvas, so please respect the work of other users and they will respect yours. Inappropriate content will be removed. Application is developed in Adobe AIR, website flash version available on http://onboard.yoz.sk .