Downloading IsWiX 4.0.15284.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The most frequent installer filename for the software is: IsWiX.exe. The software belongs to Development Tools. The actual developer of the free program is ISWIX LLC. We recommend checking the downloaded files with any free antivirus. The most popular versions of the program are 4.0, 3.0 and 2.6.
From the developer:
IsWiX makes authoring Windows Installer XML (WiX) Windows Installers (.MSI) a breeze. It includes Visual Studio project templates and graphical designers to aid you in authoring 95% of your source code. From there you can author additional code using standard WiX programming techniques.
You may want to check out more software, such as ImageUltra Builder, Short Empire for FSX or FS2004 or GnuWin32: GetText, which might be related to IsWiX.