Just curious, what are the notable usages of Nix that is not related to nixpkgs/NixOS?
Some things that come to mind:
Haumea: fairly new but very interesting file-based module system for Nix code
not-os: a bit experimental but still pretty awesome OS generator for embedded systems
POP: OOP Nix? Why not?
Standard: devops framework for Nix, itself consisting of many smaller pieces (list in the link), complete with a reference CI implementation. disclaimer: I am an active contributor
Thank you all for the list!
https://terranix.org/ - Terraform config, but with Nix instead of HCL.
I love this question! Because sometimes it can feel like you committed an abomination in here when you dare to apply Nix in other contexts.