This package (whose name, ttt, stands for transliteration-to-Tibetan) contains methods for converting ACIP transliteration into Tibetan Machine Web and methods for converting EWTS transliteration into Tibetan Machine Web. It has extensive tests, though probably not mentioned in these Javadoc documents.
When you see the term "Sanskrit" used here, it often means non-native (not native Tibetan, in other words) rather than truly Tibetanized Sanskrit. It is overloaded to refer to Tibetanized Chinese, Tibetanized Sanskrit, etc.