SnowSoftware - Snow Software are suppliers of Software Asset Management products and help optimizing licensing & minimizing compliance risk.
Chocolatey - The sane way to manage software on Windows.
Torii - SaaS Management Software.
Homebrew - The missing package manager for macOS
SoftwareKey Licensing System - SoftwareKey System is a set of software development tools that help programmers implement copy protection, license activation and management, metering, eCommerce, and business automation.
Ninite - Ninite is the easiest way to install software.