Here is a list of the 3rd-party libraries:
For mingw only:
There are sometimes mingw and msvc versions, be careful which you choose.
Download all 'bin' and 'lib' packages with kdewin-installer for the build process, set CMAKE_INCLUDE_PATH and CMAKE_LIBRARY_PATH for cmake. The Installer will put all files into the installation directory you can choose on the settings page. CMAKE_INCLUDE_PATH and CMAKE_LIBRARY_PATH should point to the include and lib subdirectories of your installation path respectively. There are some additional libraries you have to build yourself to use extended features in some apps.