Just when you thought the T16 could not get any better, Haute42 gave us the T16-C with fast Crystal switches.
The Leme Tech One is a Smash controller that runs on the proprietary Leme Tech One firmware, which is HayBox-based and HayBox-compatible.
The Atari Fire Controller is only one of many retro arcade sticks that SuperBox64 makes with a joystick, trackball, spinner, and buttons.
SmallCab offers DIY steel enclosures, such as this one leverless enclosure with 12 buttonholes on top and six more buttonholes in the back.
The DuelPad A16 is an acrylic controller that has 16 buttons with LED support and even comes with a modern console port.
P-3 Controller offers you cases like the Lotus Lever and Lotus Clear—the latter of which is a leverless case.
The Ruyi Box is a stickless controller with 18 face buttons curved quite interestingly as well as two analog sticks.
The button layout of the Meisterbox M from Bavaria is supposed to make it the most ergonomic fighting game controller.