The Mamut Touch Grip improve the Oculus Touch controllers by giving them more grip and a strap that fixes them to the hand like the Valve Knuckles do.
The 3dRudder is a VR foot controller that allows you to control your VR games with your feet.
The Pimax Controllers are wireless VR motion controllers developed for the Pimax 8k. They come in 2 variations, one with thumbstick, the other one with touchpad.
The Valve Knuckles are wireless VR controllers that work together with the Steam lighthouse tracking system.
The Windows Mixed Reality controllers that came with the Samsung Odyssey. Feature improved ergonomics as compared to the standard Windows MR controllers.
The standard Windows Mixed Reality controllers came with all Win MR headsets except the Samsung Odyssey.