Project-Builder is a tool that helps you build packages of your application (managed with a tar file or a configuration management system such as CVS, Subversion, Mercurial, or GIT). It is able to generate a build package skeleton for your project. With simple configuration files, it can generate for up to 20 different tuples of distributions (name, version, architecture), including Fedora, Mandriva, OpenSuSE, Debian, Ubuntu, Gentoo, and Slackware. It is a good tool for doing continuous packaging.
With 'nixstaller' you can easily make installers for Unix-like systems. Some of the project goals: support for many different platforms, support for different (optional) frontends used by the installer (currently FLTK, ncurses, GTK 2, and Qt are planned), ease of use for the install creator and the end user, different ways of installing (extract files to a location, compile software on the user's system, and maybe even integration for the package manager running on the user's system). Nixstaller can be fully translated and is programmed in C++ and sh.
Wine-doors is an application designed to make installing Windows software on Linux, Solaris, or other Unix systems easier. It is essentially a package management tool for Windows software on Unix systems. It is developed and styled to fit in with the GNOME desktop, but is fairly portable and a user interface could be developed for KDE. The main goals are to replace winetools, allow flexible application management, provide Queue processing capabilities, provide Application Database integration, avoid global native overrides, automatically add items to the desktop menus, and allow users to manage their Windows applications with profiles and bottles.
rpm2python is a Web-based tool similar to rpm2html that clearly displays directories containing RPMs along with detailed RPM information such as dependencies and changelogs. It dynamically creates its RPM directory index and all RPM information is read on the fly to avoid dead links.
PerlAutoInstaller (PAI) is a software deployment tool. You can use it to deploy a large range of applications silently for your users from a centrally managed server. The main advantages of PAI are automatic udapte of agents from the server, high security level using the HTTPS protocol, and a certificate authority to restrict software deployment to your company. PAI can manage a group of clients. No database backend is needed. All output from an installation attempt is returned to the server so that you can see why an installation failed.
The 64 Studio Platform Development Kit (PDK) is a version control system for GNU/Linux distributions, allowing the creation and management of many different projects, based on Debian and Ubuntu sources. PDK is written in Python, and the source code is well commented and contains documented examples.