The Knight Rider franchise has a number of novels, video games, and other materials that cover many aspects of the various series and films.
Various toy versions of KITT were released and produced solid profits. The more notable of the Knight Rider memorabilia includes the remote controlled KITT, the Knight Rider lunch box, and the deluxe version of KITT. This final model, sold by Kenner Toys and dubbed the "Knight Rider Voice Car", spoke electronically, using a recording of the voice of William Daniels, featured a detailed interior and a Michael Knight action figure as well.
In the 1980s there was a Knight Rider toy vehicle for Germany's Darda system.
Also in the 80s a Key Car of KITT was released. But it had no scanner and the windows were black with "Knight 2000" writen in red letter on the doors. It included a key which was pushed into a hole below KITTs spoiler compressing a spring; then snaps into place. Squezzing the key releases it and the spring shoos the car foreward.
As with many popular series of the era (including The Dukes of Hazzard, The A-Team etc.), ERTL released die-cast toys of KITT in three different sizes - the common miniature model, a "medium" model, and a large model. These toys featured red reflective holograms on the nose to represent the scanner (however, they were located on the point of the nose, rather like the early mock-up of KITT seen in the pilot episode) as opposed to altering the basic model design to incorporate the scanner as commonly seen in the series. The toys also included round steering wheels as opposed to KITT's steering yoke.
Also in late 2004, 1/18 scale die-cast models of KITT and KARR were produced from ERTL, complete with detailed interior and illuminated moving scanner, just like in the series.
In September 2006, Hitari, a UK-based company that produces remote control toy cars, released the Knight Rider KITT remote control car in 1/15 scale, complete with the working red scanner lights, KITT's voice from the television show and the car's turbine engine sound with the "whoosh whoosh" scanner sound effect.
In December 2012, Diamond Select Toys released a talking electronic 1/15 scale KITT that features an illuminated dashboard, scanner, fog lights and tail lights, along with the original voice of KITT, William Daniels, all at a push of a button. An Entertainment Earth exclusive version of that Diamond Select Toys 1/15 KITT, exclusive, as it will include an in scale figure of Michael Knight to go with the car, was released in February 2013 and was available exclusively at Entertainment Earth's Web site. Diamond Select Toys will also was to be releasing an 8-inch figure of Michael Knight with the likeness of David Hasselhoff, which was to be released in March 2013.
In February 2013, Hot Wheels released a 1/18 die-cast of KITT as part of their die-cast Elite series of vehicles under their Cult Classics Collection. This one from Hot Wheels was an improvement over the one ERTL released back in 2004. With sharper attention to details on the dashboard, the model features an improved light up red scanner, opening doors and rear hatch, as well as an engine hood which opens up to reveal a detailed Knight 2000 turbine engine which is exclusive to the model and was never shown in the TV series. Additional features include pop up headlights, revolving license plates, ejector seats, removable t-tops and a foldable rear seat.
A "Fun Pack" based on Knight Rider for the toys-to-life video game Lego Dimensions is planned for release in February 2017. The pack includes a Michael Knight minifigure and constructible KITT, and will unlock additional Knight Rider-themed content in the game.
In 2016, Call of Duty: Infinite Warfare's "Zombies" mode features David Hasselhoff reprising his role as Michael Knight, appearing as the games map "Zombies in Spaceland"'s DJ. The Knight Rider theme plays in game and many references to the series and KITT are made.