Wikipedia:Articles for deletion/ZHLT
This article has no references and much of it looks like original research/personal opinion.  It is also written like an advertisement or perhaps a love letter to the software in question asserting that it is a "shining example," a "household name," and "higher quality than the original game company," all of which are unsupported statements of personal opinion.  It also contains obvious speculation that it has "probably been used for 85%+ of all maps released for HL1," again with no sources cited.  It further fails to establish notability.  Just because a particular game is notable, doesn't automatically mean that a given after-market editing hack program is itself notable.  ZHLT gets a number of ghits but they all seem to be either directly related to the software (primary sources,) or niche sites; I found no significant, reliable, independent, secondary source coverage as per 
— User:OlenWhitaker, 22:15, 9 March 2008 (UTC)
Stance: delete
Cited policy: WP:N (Wikipedia:Notability)