Amazingly, I just spent ten minutes searching the web for a list of all of the built-in SQL Server stored procedures. I figured that's reason enough to post a link for the next poor sucker who has to do the same. So here it is: Microsoft's MSDN complete list / reference of all of the native / built-in / system stored procedures within the SQL Server database [1]. Given Microsoft's track record with broken links on their web site, this link will probably break at some point, so please let me know with a comment below if it goes out of date.

Thanks,
Dan