http://boundingboxsoftware.com/materialize/ For turning single texture's into PBR map's.

https://opengameart.org/ Lots of free to use asset's here including model's and sprites.

https://acegikmo.com/shaderforge/ Free node based shader editor that just went MIT license.

https://twitter.com/VRCPrefabs Prefab's made by the VRC community free to use. ( I just released one that allows for stereo audio sources on avatar's there.)

http://soundbible.com/ Good place to find quick sound effects for free. ( Still recommend leveling these with an EQ and compressor.)

https://lmms.io/ Digital audio workstation that can be used on both window's and linux to edit game sounds. (Similar to what I use "FL Studio")

https://www.myinstants.com/index/us/ Good place to download meme sound clips.

https://sketchfab.com/feed Lot's of model's here (Still pretty well known but I am linking it anyways.)

https://www.youtube.com/user/eyedesyn Lot's of tutorials here showing you how to create nice render's. (Cinema 4D tutorial's but can be translated to blender pretty easily.)

https://www.youtube.com/user/AndrewPPrice Blender tutorials (Really wholesome guy, also did a nice video on getting inspired that I loved.)

https://www.youtube.com/channel/UCZsHHoDLK0s6r44ifx0DnXQ Andrey Lebrov (Does a lot of CG and explains a lot about realistic materials and how to make thing's look like real life.)

https://github.com/Guribo/SUVA/wiki/About Turn your VRChat avatar into a Vtuber for use on Twitch.

https://www.youtube.com/watch?v=Gunhpva0Jho Creative mixing with Noisia (Useful when making audio for worlds.)

https://www.youtube.com/channel/UCrbP1bylN30XJZobnq8O2rw My Youtube where I post free music and eventually some tutorials for content creation inside of VRC.

https://www.mixamo.com/#/ AI Based rigging for humanoid characters - This is good for a quick rig that can be adjusted in blender later on.

https://discord.gg/zMyRsz4 Buddies music production discord where we teach how to make sounds. Over 1,000 members. Some game dev's in there too.

https://github.com/oofdesu/lin-unity-packages A friend's Prefab's for avatar's If you see him let him know he is dope.