Written by a Microsoft MVP to create or update MSI (Windows Installer) based installers for files, registry etc using an XML like script. Command line for automated builds (NMAKE, ANT, NANT builds etc). A HTML report can be created (with a "file verify" button). For both beginners and advanced users. Common processes can be defined once and reused in multiple projects (templates). Has extensive documentation and a large user group (500+ members).