Deface - Interactive site enabling users to undermine the notion of authorship. Synergy - Collaborative online art playspace. Million Masterpiece - A collaborative arts project and online drawing community. Anyone can add their image to the million images that make up the entire picture. Draw ball - A collaborative drawing site. One circular canvas that can be drawn on by any visitor. Drawsum - A collaborative art project with one large shared canvas where anyone can draw uncensored. iScribble - Various live multi-user drawing boards allow users to paint images using a mouse or tablet together. The Zoomquilt - An endless zoom illusion created with Flash by many collaborating artists. WebCanvas - A large collaborative painting where anyone can paint and watch others paint. FlockDraw - Free, collaborative group whiteboard. Has a gallery of previous artworks, and live chat. Superfreedraw - Every visitor can draw onto an endless virtual canvas. There is no registration or censorship. Draw Canvas - Collabrative online drawing community where you can work with others to create unbounded tile art online. We Are Unreasonable People - A group from Porto. Site features many different exhibitions: photography, computer graphics, poetry, music, net-art. CrowdPainting - Collaboratively draw on one ever-expanding canvas.No one can paint over the paintings of others. Roplixoo - A pixel art canvas where each visitor can set the colour of one pixel at a time. COLLAB - Dedicated to cooperative drawing with other digital artists on single-piece works, or digital quilting and tiling.