Dada.nyc is a platform, where artists can communicate with pictures instead of words. Once you sign up, you get a set of tools which you use to make little drawings online and once you are satisfied, you post it. Someone else can then continue the "conversation" by adding another drawing.
Last September I had the honor and pleasure to meet the founders of dada.nyc and a few of the artists at a conference in Prague. I made a seperate post for that on steemit, in case you are interested: @reinhard-schmid/in-prague-with-dada-supercharged-for-visual-conversation
Here a few of the pictures I created on dada.nyc