Free Project Management Software
From the site: dotproject is a PHP+MySQL beta level web based project management tool that dotmarketing started in Dec. 2000. While dotproject was specifically designed for dotmarketing's needs, it could probably be extremely useful for any sort of service agency that requires the ability to track a project to completion. The current version of dotproject is 0.2, which reflects that it's still early days. Still, we feel that there is a lot there that is much nicer than other "project management" systems, which seem to have the feel of "programmer only" projects.
Why am I listing this here? Because at one point I needed a tool just like this that I didn't want to pay for, and I don't want to lose this bookmark :)