Things already done

• nowiki escape

• Javascript based scalable vector graphic editor ==> Svg Editor

Other candidates:

 
 http://code.google.com/p/jsvectoreditor/
 http://code.google.com/p/svg-edit/
 http://www.c-point.com/javascript_vector_draw.htm
 http://jsdraw2d.jsfiction.com/
 http://raphaeljs.com/
 http://thejit.org/
 http://ianli.com/sketchpad/

 http://javascript.open-libraries.com/utilities/drawing/10-best-javascript-drawing-and-canvas-libraries/

 http://www.xdraw.org/javascripts/
 http://www.xdraw.org/xdhTest.html
 http://ajaxian.com/archives/create-cross-browser-vector-graphics-with-dojo
 http://thinkvitamin.com/code/create-cross-browser-vector-graphics/
 http://dojotoolkit.org/api/
 http://dojotoolkit.org/documentation/
 http://dojotoolkit.org/documentation/tutorials/1.6/hello_dojo/
 http://dojotoolkit.org/reference-guide/dojox/drawing.html#dojox-drawing
 Dojox Drawing