Nice
I was just going to make a new thread for "Project Management Software" ideas (maybe consider renaming this thread?). Anyway, here is a list of mine that I've come across. Need I mention that I have not used any of the ones below
dotProject - My host offers it as a one click.
ProjectPier - I'm installing this as I type this, to try it out. It has a nice web GUI.
Collabtive - I'm also going to be installing this. It has a super simple GUI that looks nice and doesn't appear to come with many advanced features, just the critical ones to keep it simple.
qdPM - A web-based PM.
I will try to remember to post which one I like better (ProjectPier or Collabtive - I'm guessing Collabtive as of right now) after I try them out.
There are also a few more ones to try from
this blog post as well about open source PM software.