Jef Poskanzer's ACME Labs preserved one of the defining clichés of the 1990s web: the Under Construction page, complete with tracked search counts showing how quickly the phrase spread across the early public web.
The Wererat's Lair is a hand-coded rat, gaming, and personal site dating back to the 1990s, with pet-care material, galleries, MIDI, JavaScript tutorials, campaign journals, and a deliberately preserved mid-1990s visual style.
2meta's April Fools on the Net archive preserves online pranks from the 1990s onward, including fake acquisitions, bogus security advisories, joke RFCs, and other nonsense from before social media centralized the joke cycle.
The Heaven's Gate website remains online as a disturbing primary artifact of 1990s Internet history, preserving the group's writings, transcripts, press material, and final public messages from before the deaths of 39 members in 1997.