While I was compiling a list of all MT template tags, I ran across some tags that are not documented in the MT manual. Here is a list of those tags with an approximate explanation of what I believe they do:
Returns a URL for the Creative Commons License image/logo.
The relative URL (path) extracted from the CGIPath setting in mt.cfg.
Alias for MTCommentAuthor.
The setting for SearchScript in your mt.cfg file; the default value is mt-search.cgi.
The setting for XMLRPCScript in your mt.cfg file; the default value is mt-xmlrpc.cgi.
These tags are not anything earth-shattering, but I thought they were interesting. Why was I compiling a list of template tags (and attributes)? So I can take full advantage of UltraEdit's syntax highlighting when editing my MT templates.