I run Digital Soul, a Discord server that acts as a library for free vroid assets.
You can find more information about this project at twitter.com/digitalsoulvr
I also make free vroid assets of my own over @ 404dotexe.booth.pm
My work is sometimes original, but usually a combination of free assets with my own personal customizations. I will link back to anything I didn't create from scratch, but if you see that I missed crediting an asset please let me know.