Like Firefox 3.0? Need a quick and easy-to-use prototyping tool? Just download this add-on called The Pencil Project http://www.evolus.vn/Pencil/ for Firefox 3 and sketch away! I wanted a tool that is lightweight and unobtrusive that allows me to quickly sketch my prototypes without the need for visual studio or a similar developer tool. This add-on to Firefox was just that! I was able to get good looking interfaces within minutes of downloading the tool. It’s free, only 400 KB and it’s platform independent. If you (like me) find that other tools out there are too complicated or do too much for your simple prototyping needs then try this one!