In the fightstick world, the Hall effect can often be summarized as being able to customize the actuation point of switches.
You can buy the Sando in leverless or WASD format, and its uncommon GEON switches have a customizable actuation point.
The many features of CORSAIR's Novablade Pro include MGX Hyperdrive switches with a Hall effect—as well as FlashTap SOCD tech.
The Varmilo HA10 is a leverless version of the popular Kassai, and it staggeringly has 18 buttons—plus some blank buttons.
The Beacon offers you many unique benefits that range from Hall effect switches to a charm loop where you can attach a cute little trinket.
Junkfood Custom Arcades came up with the SWORL to solve the Snack Box Micro's limitation of only being for fighting games.
You can buy the PadBox GS preinstalled with a non-split or split D-pad, and it's good for fighting games & other genres.
At a first glance, you may think this is a DOIO controller, but in reality—this is the NLOFIN NLHX-ET01: a 16 button controller with LED.