A hitstick is when you have an arcade stick but with extra buttons that allow you to use the buttons and joystick for movement.
The Modulus is a modular controller that allows you to choose its layout and shape from a list of presets or something completely custom.
The DoubleSalt is a hitstick with directional buttons that are more slanted than usual, and three of them are smaller than the other buttons.
Okayama Tactical Gaming's Ikaruga is so customizable that you can even order it with the unusual layout depicted in the picture.
The Ultra Arcade CNC features an aluminum enclosure by SiTong and can feature premium parts from brands like Sanwa and Cherry.
There's no need to travel back in time to 2009 to pick up a brand new TE when you can instead grab Ultra Arcade's replica.
The Kurogane by Okayama Tactical Gaming has some pretty interesting custom options, such as an optional slope.
Brian Hill Woodworks is an LLC that offers wooden cases in lever or leverless format that are finished with Danish oil.
Doesn't this controller remind you of Tetris? And No More Lines offers many other layouts—sometimes with all buttons (or even a joystick)!