There are countless good projects that we haven't highlighted for the lack of space, you can find a curated list here.
We would also like to give a huge shout-out to folks who actively help others out on the Forums, especially ptrblck, jpeg729, QuantScientist, albanD, Thomas Viehmann and chenyuntc. You are providing an invaluable service, thank you so much!
Metrics
In terms of sheer numbers,

87,769 lines of Python code on github that import torch
3,983 repositories on Github that mention PyTorch in their name or description
