SuperOrca from "Pantaray Research Ltd." is a direct replacement to the "Orca" utility from Microsoft. SuperOrca may be used to examine and modify an MSI database.

Features
SuperOrca - is a free software.
SuperOrca - can be easily downloaded from the internet, no need to download and install the entire Microsoft SDK.
SuperOrca - will allow you to scan and manipulate all MSI database tables in an intuitive and user friendly manner.
SuperOrca - will not lock the MSI file you are working on, so you can test it with other tools or even install it while the file is still opened in SuperOrca.
SuperOrca - features a powerful "Compare" function that will compare two MSI files, and display any differences in a clear and meaningfull way.
SuperOrca - features a powerfull "Search All" function that will search a text literal across all database tables in one operation.
SuperOrca - version 1.X is distributed free of charge to the software development and IT comunity.