original mat lib collected from the community form here:
Thanks to everyone for their help.
the mat lib is a little large & needs refining. you can add & remove your own materials too.
It contains a .blend file with all the materials as Fake User for appending.
Also included is an .xml file providing a categories list for ready to use in Matlibvx addon.
simply put the .blend & .xml, in the matlibvx folder, in addons folder & enable the addon & enjoy the presets.