Hi
I have looked many times for an alternative to confluence. Its expensive slow and just a little buggy. The truth is, I have never found one.
That said, I am willing to build one for you. I am assuming you want something along these lines
A system that can house a number of projects, which can be assigned to a department of client.
Each project can hold notes, blogs, documentation, and have a decision like system.
Email notifications on updates
Please contact me if this is something your interested in