So You Want to Compete with Steam
Really, Steam seems to be the closest thing Windows has to an application/package manager[0].It's almost kind of a shame that it's more or less entirely for games and game development software - something like it with sourceforge/github integration or an API for general purpose Windows installers would be nice.[0]notwithstanding whatever Windows 10 might have, because I still refuse to touch that, but it's probably not as good as the Steam client.