The GP2040 firmware is extremely popular for its low latency, decent compatibility, SOCD cleaning, and more—especially if we’re talking about the GP2040-CE variant.
The FightBox M3 is a three-in-one hitstick that lets you use it as a lever, leverless, or WASD controller—and it has premium Sanwa parts.
The YagoBoard's maker is really into anime, so you can also get an anime illustration from the maker—or something completely different.
The Pocket is a mini all-key controller by Perfect Clear with two extra DSA keycaps on the upper right side.
The KeebBrawler-01 is a mini stickless controller that most notably has a wide jump button and unique attack button layout.
The Sonicon TitanStrike Arcade Fight Stick has Sanwa parts, an OLED screen, customizable artwork, and more.
The Neobox is an enlargement of the open source Flatbox. It also spares you from building a Flatbox yourself.
The Slab Mini All Button Controller is a sandwich acrylic case controller with hot swappable sockets and LED.
Arborcade makes classy wooden controllers without sacrificing performance, such as a walnut or mahogany controller with Sanwa buttons.