pkginst is a simple package installer, for unix and unix like platforms. Providing a simpler install structure. Allowing simple install of packages or more complex scripted installs.
AutoUpdater is a Java API and a program to automatically install code from a web server to a client. Clients running it will mirror the target directory structure from the server. Supports compressed server files and incremental updates.
Winona is a PHP driven tool for installing various packages like Mediawiki from your browser. Its modular structure makes it extensible through plugins. Installations can be heavily modified rather than using the default installer.