We are in the middle of looking for open source change control management software. Preferably turn-key software where I just have to design some forms and then it emails appropriate people for approvals, disapprovals etc.
I have looked and looked and can't find anything.
Don't know good open source software for change management, however you could try Microsoft project for this purpose. It's EPM solution has different tools for overall project management. This project managing software can be used for managing changes, tasks, demands and resources effectively.