A requirement in a small project I've been working on recently came up for mapping an XSD directly to an RDBMS schema on the fly (i.e. an incoming XML schema needs to be generated into an RDBMS schema structure at runtime...I won't get into specifics as to why), so I started searching for a way to to do this via the BCL.  The new SQL Server SMO libraries looked promising, however they are vast and patience quickly lost out to a some good ol' one on one Google time.  I ended up stumbling across this tool; even though the last release was 2 years ago so far it has worked quite nicely and it does appear to still be in (somewhat) active development.