The Pencil Project is a free prototyping / wire framing tool that is available on Windows, Linux and Mac
This useful tool lets you quickly and easily create wire frames for website projects as well as apps and database processes, being available on Windows and Mac means that all members of the creative team / process will be able to view and edit the wire frames.
Make sure you download option 2 so that it runs as a standalone application and not a firefox plugin as when you update firefox it disables the pluign :
http://pencil.evolus.vn/en-US/Downloads/Application.aspx

Blog post by Alex Wells
Working as a Website developer I love nothing more then working waist deep in code, I have specific interests in PHP and WordPress development but mostly working with local businesses to provide them with a website that meets their needs. Contact me if you have a project in mind and would like to get an input from an experienced website developer.