Punk Workshop describes the PE as its slimmest & lightest controller yet, and its photoelectric switches are ultra fast.
Available in different colors, the VoltPad has WASD directional buttons accompanied by attack buttons in a modified Vewlix layout.
The Familiar is a DIY enclosure with interesting design elements like a detachable magnetic bottom and even a detachable nylon strap.
The Pocket Controller is about the size of a bigger smartphone, and a couple of its buttons are almost pill-shaped.
If the Mad Catz NEKO's buttons are too many for your needs, then the NEKO KO's lesser buttons might appeal to you.
You can use the Hori Arcade Classic Pro's ball-top joystick, rotary joystick, trackball, and spinner modules with your right or left hand.
The HauteBox One is a wireless split-layout controller with lever and leverless modules that are interchangeable.
The Mixbox 2 improves upon the first Mixbox by having three layouts in one: WASD, leverless, and hitstick layouts.