This repository contains the [PuTTY SSH client] (http://www.chiark.greenend.org.uk/~sgtatham/putty/), patched to support GSS-API key exchange and [Heimdal] (http://www.h5l.org/). It also contains patches to build a Win64-version of PuTTY, complete with support for the 64-bit versions of [Heimdal for Windows] (https://www.secure-endpoints.com/heimdal/) and [MIT Kerberos for Windows] (http://web.mit.edu/kerberos/dist/index.html#kfw-4.0), and better support for building with MinGW.
You may find binaries [here] (https://marcussundberg.com/putty/).