Drawing in HTML5 using Canvas with Save as image feature
Can I create a drawing web application with the canvas object in JavaScript? - Quora
HTML canvas arc() Method
HTML5 Canvas Drawing App (Part 1/6) - YouTube
Draw points (circles) on a canvas with javascript html5 | Our Code World
GitHub - krisrak/html5-canvas-drawing-app: Sketchpad app using html5 canvas to draw using touch or mouse, works on iOS, Android, Window Phone and browser