Ninite - Ninite is the easiest way to install software.
NuGet - The NuGet Gallery is the central package repository for NuGet, the package manager for .NET.
Chocolatey - The sane way to manage software on Windows.
Scoop - A command-line installer for Windows
Just Install - just-install - The stupid package installer for Windows.
Ubuntu Sources List Generator - Ubuntu Sources List Generator is a website where you can generate a sources.