Welcome to ajaxSketch – an ajaxLaunch family application
AjaxSketch is basically a pared down version of Illustrator or Inkscape — perfect for creating quick charts and diagrams from scratch. It includes autoshapes, pencil mode, and text for creating the basics. You can also edit by resizing, rotating, changing background or pen color, and altering opacity.
The reference to Illustrator and Inkscape is a very bold statement, this is a simple sketching application which currently feels like a very early beta. Still worth a look.