V-RAY for MAYA shader library
Yes! For you people out there who use Vray, I highly recommend you grab this shader library tool by Oliver Markowski. It comes with a shwack of presets, a test sphere file that you can create and export your own shaders and a very cool GUI for Maya. It's a bit of work to install and NOTE: you have to convert all of your .jpg preview files to .png files for them to be viewable in the GUI. But when it's up and running - this is a great tool for shader organization.