
Here is a comparison along with download links for 64 and 32 bit versions: I have also used MIT Kerberos successfully with an older release of OpenAFS but have not tried it in combination with the current release.

Apparently MIT Kerberos for windows isn't really updated any longer by MIT though Secure Endpoints, Inc has released a 64-bit version and updated Identity Manager. The current release of OpenAFS 1.7.4 recommends the Heimdal Kerberos implementation.

