Octopi - pacman GUI
Powerful Pacman (GUI | frontend) written in Qt
Package manager
Synaptic Package Manager
Sparkle project
Flatpak
The days of chasing multiple Linux distributions are over. Standalone apps for Linux are here!
Homebrew
The Missing Package Manager for macOS (or Linux).
MacPorts Project
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.
Package Control - Sublime Text package manager
Chocolatey - The package manager for Windows
Chocolatey is software management automation for Windows that wraps installers, executables, zips, and scripts into compiled packages. Chocolatey integrates w/SCCM, Puppet, Chef, etc. Chocolatey is trusted by businesses to manage software deployments.
Anaconda.com
Anaconda is the birthplace of Python data science. We are a movement of data scientists, data-driven enterprises, and open source communities.
Ninite - Install or Update Multiple Apps at Once
The easiest, fastest way to update or install software. Ninite downloads and installs programs automatically in the background.