MSIDIFF is freeware to compare or disassemble Windows Installer databases (a MSI to TEXT utility). While it is a command line based tool, the installer creates shell extensions so that it can be invoked by right clicking on a file in Explorer.
Creates professional Setups for Windows software: multilingual installations, shortcuts, file associations, standard licence texts, detailled documentation for each project, secure test mode
TyphoonInstaller is an full featured installation system for software developers. TyphoonInstaller includes a built in wizard to create a fully functional installation of your software product in just minutes. Customize any installation.
SuperOrca is a direct replacement to the Orca utility from Microsoft. SuperOrca is a user friendly tool that can be used to edit an MSI database. Include powerfull search and compare functions.
Excelsior Installer is a free installation software for Windows applications. Creates compact and good looking setup packages as single self-installing EXE with almost no efforts.
WinINSTALL LE is a FREE software packaging and application installer management solution that supports the latest MSI schema and provides the functionality, consistency, and ease of use. Now support for Windows Vista and Windows 7.