A while ago (while I was still in Autodesk Mudbox beta program), I noticed that one of the major requests for the developers was to implement some basic mesh deformers for Mudbox. Since I was also evaluating the potential of developing some pipeline tools for our artists at work anyway, I went ahead and wrote some to test-drive the SDK. While it exposed some issues with the underlying architecture (which I forwarded feedback onwards, of course), I never really had the time to complete an intended tutorial about it. As such, I've released the source in the hopes that people who still make use of Mudbox in their content pipelines have an easy to understand reference implementation.
The repository is available here: https://github.com/sonictk/mudbox-deformers