WebERP/Task Management?

I use WordPress for IT documentation in our department. “If you know how to do/fix something, you better make sure the rest of us know how to do it”. Aside from documentation I have been linking other internal web servers to our WordPress site to kind of make an “all-in-one” site for our admins to use.

We are now looking for something to organize PC ordering; just something simple instead of putting up a white board and making a grid on it with tape.

Anybody know of any plugins or anything that can accomplish something like this? I would like to do something in WordPress without getting yet another external web server hosting software like TaskFreak.