Open Source Windows Software Distribution Software

NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution. Being a user's first experience with your product, a stable and reliable installer is an important component of succesful software. With NSIS you can create such installers that are capable of doing everything that is needed to setup your software. NSIS is script-based and allows you to create the logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components, install or update shared components and more.

Add auto update ability to an exsiting software. Just use serveral lines of code, your software will has the live update function. And you can view the clients update status, create update package on the server side through a GUI program. Support C#/VC/V

WinPack if an automated software manage system for Windows to install, remove, upgrade and downgrade softwares.It get information from the update sources. Do some similar work like google pack and Synaptic.

This is runned on windows which is written by AHK and it contains mysql5, apache2, php5