A leverless controller is supposed to eliminate sluggish joystick movements. Sometimes, it has only buttons or a mixture of buttons and keys.
The Granola Summit is an open source PLA Pro controller that has a port for additional console compatibility.
The K10's unmatched Crown buttons coupled with Cherry MX Speed Silver switches make it a formidable controller in any tournament.
The KBGM-H04 is a dual layout controller with an aluminum alloy top and acrylic bottom. You can also add an extender for your wrists.
Just when you thought the T16 could not get any better, Haute42 gave us the T16-C with fast Crystal switches.
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.