Vortex Sound Research

I want to get some good free patch libraries. Got the 4 available on the Yamaha marketplace, and would like to find more.

Considering that the MODX can open fundamentally any library file from anything since the Motif, up to the Montage, I would expect that there is a lot out there available, beside the paid libraries.

Does anyone have links where to find libraries? I did search around but found only few sites with free libraries.

Also are there any editor for libraries files? I believe libraries files contain both patches and samples, so I would assume there are editors/librarians to make your own.