This is a question for the marketing department. :) That tagline is the original. Currently there are two sentences on the front page of http://wixtoolset.org/ -- "The WiX toolset builds Windows installation packages from XML source code. The toolset integrates seamlessly into build processes." Then there's paragraph/bullets on http://wixtoolset.org/about/. I'd probably suggest the first sentence: "WiX toolset tools that build Windows installation packages from XML source code." It needs updating for WiX v4, because SWiX makes it false on both ends of the sentence. :)