Click on the images below for more details. Some older PS2 controllers can still be found for sale at Japanese auction sites.
Many of the controllers below can be made to work with most games machines or computers with suitable controller adapters.
Please feel free to e-mail firstname.lastname@example.org for help on anything one hand gaming related.
Game Control Mixer 1 Handed adapter. Convert standard controllers to one handed.
A well built controller from HORI. D-pad is for left-handed use.
Ambidextrous One Hand gaming controller.
Basic PSone era gamepad. Some controls can be remapped.
Stick has three switchable modes: D-pad, left-stick and right-stick.
3 modes of play: Conjoined, two halves or one handed (right-hand).
Finger controlled Dance mat.
Nintendo Switch Joy Con joiners. See also The Controller Project below.
3D one-hand gamepad attachments ready made and assembled by Akaki Kuumeri.
One handed controls with one analogue stick and many buttons. Titan Two compatible.
From Ben Heck
Various custom built one-handed controllers.
From Evil Controllers
Various well priced one handed solutions for PS4 or Xbox One.
A Playstation 2 digital controller with 14 buttons and 2 digital thumb-sticks.
Various French one-hand custom controllers.
Many Nintendo Wii games can be played one-handeded. This NeoGAF post lists some of them.
There are a number of people and organisations that may be able to build you a tailor made controller at a price.
Posts on one-handed gaming. Some free methods.
3D printed solutions for gaming for free or at cost price!
Discontinued rare controller with interchangeable control pods.
One hand controller designed to be used with the PS3-SAP module.
OneHandDesign.com - French outfit supporting 3D printed one handed modifications.