The source code for the binaries included in the Windows distribution of Kitlist can be downloaded from http://www.smartpixie.com/downloads/. It is provided to comply with the requirements of the GPL and LGPL licenses.
Most of the binaries that the kitlist program depends on were extracted from the 'redist' folder of the gtkmm Windows installer.
The Kitlist source code can be downloaded from the kitlist source directory.
Documentation is available here.