Windows installer development tool
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.
open source client management system, software deployment
opsi is a Client Management System for Windows and Linux clients based on Linux servers. opsi is used for automatic OS installation, software depolyment, hard- and software inventory, distributed software depots.
Silent Downloader and Installer
The Solution for Windows Silent Software Installation. The Great Unattended Project - TGUP is an Online Unattended Installer that downloads and installs latest versions of commonly-used freeware silently in sequence and sorts them into the startmenu. See TGUP in Action: http://www.youtube.com/watch?v=r6t--dDbYHM
Create installable packages for Debian based systems.
Debreate is a utility to aid in creating installable Debian packages (.deb). The goal behind the project is to make developing for Debian based Linux distributions more appealing, with an easy to use interface for packaging applications, artwork, media, themes, etc. Currently, it only supports "binary" packaging which allows packaging of anything that does not require being compiled from source, such as scripted applications or media. These packages can then be used for personal distribution. Plans for using backends such as dh_make & debuild for creating source packages are in the works. But source packaging can be quite different & is a must if you want to get your packages into a distribution's official repositories or a Launchpad Personal Package Archive (PPA).