The parody site whitehouse.gov1.info mimicked official-government presentation and built a deliberately fake presidential missile-launch interface complete with bogus codes, target selection, status messages, and repeated disclaimers that none of it was real.
J. Geoff Malta's 1997 parody homepage deliberately stuffed itself with the design habits of the early Web—and then preserved years of emails from visitors who missed the joke.
WeirdCrap's old Chick-tract section preserves a peculiar corner of early Web parody culture built around remixed versions of Jack Chick's tiny religious comics.
BagdadArkansas.org presents a suspiciously polished chamber-of-commerce guide to hotels, restaurants, memorials, a casino, and Crazy Andy's Cow Petting Zoo and Burger Store. The joke is that it almost plays the whole thing straight.
MXC.ch styled a small personal site as the confidential headquarters of the Malt-Whisky Experts Consortium, complete with fake secrecy, Vauxhall Cross flavor, free-SMS tools, and wonderfully unserious corporate language.
Syd Lexia's 2010 Top 100 Virtual Boy Games list is an elaborate April Fools parody built around a console whose entire commercial library was nowhere near 100 games.