The issue isn't as much availability of software as much as it is the knowledge of what to do with it. For instance the room EQ software might catch an uninitiated user by for instance having a large mode have a null at the mic position and when correcting this actually make the room worse. True's bob, thus happens.
Nice software: FRD consortium: tool that allow for really professional results when employed correctly, but requires a little bit of understanding of acoustical principles.
Also highly recommended is Audua Speaker Workshop. I will probably use this on Fest so that people can pose Alex questions like what if I tried doing this passive? It allows a lot of things and if we can get the people decent data for their projects they can do a couple of things themselves (this means I have to fix my Wallins Jig, too many things, too little time)
I recon links to the software is a good starting point. Otherwise we'll just leech bandwidth off the server.