I use nix & brew as my package managers on macOS. Entropic - Federated package registry for anything. Repology - Monitors a huge number of package repositories and other sources comparing packages versions across them and gathering other information. Spack - Flexible package manager that supports multiple versions, configurations, platforms, and compilers. (Docs) rebuilderd - Independent verification of binary packages - reproducible builds. dripip - Opinionated CLI for continuous delivery of npm packages. PRIVJS - Implement access control to your npm packages. distri - Linux distribution to research fast package management. (Code) pkgsrc - Framework for building third-party software on NetBSD and other UNIX-like systems, currently containing over 22,500 packages. Conda - OS-agnostic, system-level binary package manager and ecosystem. (Docs) ossmalware - Attempts to use dynamic analysis to find malware hosted on package managers. GoFish - Cross-platform systems package manager, bringing the ease of use of Homebrew to Linux and Windows. (Code) (Fish Food) fpm - Packaging made simple. Goal of fpm is to make it easy and quick to build packages such as rpms, debs, macOS packages, etc. (Docs) UPM - Universal Package Manager - Python, Node.js, Ruby, Emacs Lisp. Deps - Command line tool for staying on top of dependencies. It runs updates, automates pull requests, and keeps your local installations in check. binwrap - Distribute binaries via npm. version - What version do I have of ___? rinstall - Helper tool that installs software and additional data into the system. asdf - Manage multiple runtime versions with a single CLI tool, extendable via plugins. Denxi - Programming model for distributing data. It reduces the cost of producing package managers, storefronts, operating systems, and CI/CD systems.