JS WARS is a classic shoot 'em up written to demonstrate the power of modern Web browsers. It is targeting Firefox 3.5 with its audio/video support and increased performance, and uses the canvas tag. It should work well in other modern Web browsers (supporting the canvas tag), just without the music and sound effects.
Canvas Turtle is an object that interprets and renders graphic commands in a Canvas. It provides an API for rendering basic drawing primitives in 2D and includes commands that define the position of the graphics to be rendered, conditionals, loops, and so on. Commands are supplied as text strings with a simple syntax.
Lightning effect JS is an object that can draw a random lightning bolt on the page. It can create a canvas on which a glowing random line similar to lightning bolt is drawn within given page boundaries. The position, color, and thickness of the lightning bolt are configurable parameters.