NixOS

Guide

haskell-nix: Nix and Haskell in production
nix.dev: An opinionated guide for developers getting things done using the Nix ecosystem.

Arch

nixos-pi: How to install NixOS on raspberry PI
NixNG: A lighter and simpler design against NixOS

Converter

See nixpkgs manual

Repos

pr & other tracker

Nix

noogle: search nix library
nixhub: search packages with history
flake-utils: simple flake framework
rust-overlay
emacs-overlay
devenv: Fast, Declarative, Reproducible and Composable Developer Environments using Nix

Utils

Secret

sops-nix: Atomic, declarative, and reproducible secret provisioning for NixOS based on sops.

Server

eris: Serve your /nix/store directory over the internet
nix-serve
s3: this can serve /nix/store as well to let nix copy work.