File Format Plugins
usdat DreamWorks usd ASCII format with templates. usdat allows the definition of a common template layer for an asset. Properties and references can be defined at asset install time as part of the reference to that asset when it is added to a scene, rather than using a separate composition arc like an override or a variant.
usdStl An STL file format plugin for USD by Charles Flèche
usdFBX An FBX file format plugin by Remedy Entertainment. Related blog post: https://www.remedygames.com/northlight-openusd-workflows
usdz
Apple's Reality Composer exports scenes to USDZ
Sketchfab has nearly a half million USDZ files available for download
USDZ at Apple WWDC 2018 presentation
UsdSkel for Apple's ArKit
Apple News USDZ files can be embedded in Apple News articles
ARKit USDZ format assets from Apple
Samples from FusionAR USDZ format assets
GiDiOdev a few USDZ format assets
License: CC BY 4.0, Copyright Contributors to the ASWF USD working group.