Farum Data's surviving trail connects a small Danish data-conversion business with magnetic-media recovery, unusual disk hardware, and later efforts to revive and document Philips P800 systems.
Oldskool's Lode Runner shrine preserved maps, versions, utilities, and fan knowledge for a 1983 game whose long life depended as much on players as publishers.
Carl's Friends used the Web, Usenet culture, volunteer labor, and postal mail to preserve and distribute Carl Griffith's 1847 Oregon Trail sourdough starter.
FloorBorders.com documents hundreds of face-nailed parquet border patterns found in Brooklyn homes, with photographs, measured drawings, spreadsheets and historical construction details.
Hallowed Haunting Grounds documents a Studio City Halloween display that ran from 1973 through 2005, preserving its illusions, maps, audio and history online.
The archived Thrower website preserves one of the Web's earliest communities devoted to sport knife throwing, complete with mailing-list culture, club history and late-1990s links.
ThemeParks.ie turns years of personal amusement-park travel into a country-by-country photographic archive of rides, fairs, vanished parks, and coaster construction.
Aaron Fuegi's old Cosmic Encounter archive preserved rules, printable components, expansion material and fan knowledge for a board game whose editions and supplements had become difficult to reconstruct.