Homebrew - The missing package manager for macOS
Chocolatey - The sane way to manage software on Windows.
NixOS - 25 Jun 2014 . All software components in NixOS are installed using the Nix package manager. Packages in Nix are defined using the nix language to create nix expressions.
Scoop - A command-line installer for Windows
MacPorts - The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system.
Ninite - Ninite is the easiest way to install software.