I use Gantthead for project management info and top-notch templates. I haven't yet found a project plan yet that I could use without alteration, but have found many project plans usable as the starting point for a project. My personal favorite is the EVA project plan template. Gantthead recently rolled out a new feature called Ganttface which encourages PM's to set up their own public profile. My profile highlights for my work as a Project Manager/Business Analyst.
I also recently started using a set of free, public tools on Basecamp HQ for a project I'm working on with Chuck Westbrook. These tools are helpful too for providing starting places for project initiation.