DrawPile, QueekyPaint, Drawsum.com - The open art project, Aggie.io, Drawesome, MultiDraw, MagicalDraw, PanelJam , iScribble, Draw It Live, Anondraw, We Draw Comics, malmal, FlockDraw, Drooodle, Formgraph, Interference, mmpaint, Sketch Fiddle are some alternatives to FlockMod.