An arcade stick is a controller that often comes with a joystick on the left and buttons on the right. It can make many fighting games easier to play.
The Zero Two is a modular controller that can be ordered in lever or leverless format—as well as preassembled or DIY form.
The Zero One is available in multiple layouts and colors—plus preassembled or DIY formats—and an overall modular design.
In addition to a Sanwa joystick, you can order the Joytron EX Revolution with a Crown lever variant of your choice.
The Taito Egret II Mini Control Panel can be used with the Egret II Mini arcade cabinet or as a PC arcade stick (with the proper drivers).
The 4 in 1 Joystick is an obscure mini arcade stick that can be found in many online stores, and its red-black combination is eye catching.
Although it has a bat-top joystick, the PC Ranger's octagonal restrictor gate makes circular motions easier for you.
The Cross|Up allows you to simultaneously use a joystick and buttons to input directions, creating new possibilities.
Ultra Arcade's Standard series is a reasonable entry point into its customizable controllers, and there are Pro & Lite editions available.