10 great free desktop productivity tools that aren't OpenOffice.org

But apart from OpenOffice.org, what else is there? I dug into my own program folders and searched the far corners of the Web to come up with a cache of free and open source productivity applications for a range of desktop productivity tasks: word processing, page layout, graphics editing, illustration, task management, and more. Some of these tools are worthy substitutes for expensive commercial counterparts. All of them are available for Windows, and nearly all are available for Linux and Mac OS X as well.