Also I'm trying out Kontakt GUI Maker. The interface is really simple, but it does have a convolution reverb which sounds much better than regular reverb. Note these are all Kontakt instruments and need Kontakt 5.6.6.
A think the best way to distribute these are as complete packs of roughly 10 to 15 instruments each in 400 meg or so zip files. Just unzip in your chosen directory and they are ready to be used in Kontakt. Just drag the .nki file into Kontakt or locate them in Kontakt's 'File' Tab.
Acoustic Keyboards Volume 1
Acoustic Brass Volume 1
License: The dataset is made available by Google Inc. under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.
Jesse Engel, Cinjon Resnick, Adam Roberts, Sander Dieleman, Douglas Eck,
Karen Simonyan, and Mohammad Norouzi. "Neural Audio Synthesis of Musical Notes
with WaveNet Autoencoders." 2017.