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 the decompile operations can be invoked by right clicking on a file in Explorer. The output is very easy to read and can be processed by my MAKEMSI tool or can be further processed via my PPWIZARD preprocessor.
BKAudio 2.0.0 - The BKAudio v2.0 class library allows you to visually add sounds to your .NET applications! Per Developer and Source Code Licensing are available. In both cases, there are no runtime royalties or other fees! Updates for the current version are free.