InstallPad!

Chocolatey NuGet is a Machine Package Manager, somewhat like apt-get, but built with Windows in mind. It is built on top of NuGet command line and the NuGet infrastructure.In terms of updates, it allows you to update nearly everything on your machine with a few simple keystrokes.

Ketarin is a small application which automatically updates and optionally installs setup packages by monitoring web pages for changes. As opposed to other tools, Ketarin is not meant to keep your system up-to-date (like a package manager), but rather to maintain a compilation of all important setup packages which can then be burned to disc or put on a USB stick.

The Ubuntu Software Centre gives you instant access to thousands of free and open-source applications. And now you can buy apps from some of the leading providers too. All our software is easy to find and install so you can have a customised desktop that suits you in no time.

The Mac App Store is the best place to find apps for Mac. No more boxes, no more disks, no more time-consuming installation. Just like the App Store for iPhone and iPad, click once to download and install any app on your Mac.

Zero Install is a decentralised cross-distribution software installation system. Other features include full support for shared libraries, sharing between users, and integration with native platform package managers. It supports both binary and source packages, and works on Linux, Mac OS X, Unix and Windows systems. It is fully Open Source.

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.

App Grid is a new lightweight Ubuntu Software Center alternative that tries to make application discovery easier by using a grid view which includes app screenshots and ratings.

Ubuntu Sources List Generator is a website where you can generate a sources.list file with a lot of useful repositories.

win-get is an installer and software repository for Microsoft Windows, like apt-get in Linux.

The Debgen is a tool that allows the user to create /apt/sources.list file by adding some extra repositories beyond the standards.

A simple web based app which streamlines the installation of common Mac apps. Perfect for to use after a fresh installation of OS X.

A world of apps in the Microsoft Store.