HTAG is a programming language developed by SvenNeumann because he was fed up with other languages only almost doing what he wants them to do.
HTAG is mainly intended for the design of WebSites.
The website http://www.GoldenPagesMalta.com is written now almost entirely in HtagLanguage (although a slightly out of date version) while the rewrite in pure HtagLanguage is almost complete (as of 2003-07-14) and is currently found at http://ywp.d2g.com.
Apparently none - not that I looked very hard.
Moved from HtagCommand
Commands in the HtagLanguage.
See also: AllaireColdFusion