The following detail some of the larger standard controllers available for gamers. If none of these are suitable, try the switch gaming area, or tailor-made area. Click on the images below for more details on each controller. Please feel free to e-mail for help on anything that is unclear.
From OneSwitch.org.uk (UK)
Massively powerful joystick and switch interface for many consoles and controls.
From OneSwitch.org.uk (UK)
PC and Xbox Adaptive Controller compatible joystick. Extra switch options available.
From Edupro (Netherlands)
A USB controller for PCs that takes the place of a mouse controller with extra functions. Search on "Funkey" at the Edupro site for more.
From Edupro (Netherlands)
A USB digital joystick for PCs to take the place of a Mouse. Search on "Funkey" at the Edupro site for more.
From HORI (Japan) and eBay
PS3 controller with large buttons and analogue controls.
From LP Accessible Technologies (USA)
Xbox 360 controller with separate analogue joystick designed to be chin-mounted.
From MAS Systems (USA)
Impressive looking controller with analogue stick emulation modes, so most games should be compatible. This unit is not compatible with all games.
From Broadened Horizons (USA)
Gaming controls split up into separate modules with larger controls.
From BlueTip Gaming (USA)
A range of arcade stick controllers with analogue sticks. Previously known as Quasimoto and Rowdy Monkeys.
From Tash (USA) and Tech Cess (UK)
Large coloured direction-pad with an additional central button. USB compatible to suit PCs. Has also been available with a D9 connector, making this suitable for use with with Atari Joystick compatible devices.
From Tash (USA) and Tech Cess (UK)
Large joystick and switch. USB compatible to suit PCs. Has also been available with a D9 connector, making this suitable for use with with Atari Joystick compatible devices.
From Tash (USA) and Tech Cess (UK)
Large controller, with a horizontal spread of five buttons. USB compatible to suit PCs. Has also been available with a D9 connector, making this suitable for use with with Atari Joystick compatible devices.
From X-Arcade (USA) and Gremlin Solutions (UK)
Very solid digital arcade stick with analogue stick emulation modes. Compatible with PCs from the off, and most games consoles using specialist adapters. This unit is not compatible with all games.
There are a number of people and organisations that may be able to build you a tailor made controller at a price.
Were from OneSwitch (UK)
A large left or right handed joystick with attached pedals allowing for a versatile way of playing games on a USB equipped PC (and even retro games machines).
Best Electronics - A large range of old Atari style joysticks.
Controller Adapters - Enabling Playstation controllers to be used on alternative games consoles and computers.
Edupro - A large range of Joysticks and Trackballs are detailed at this Dutch site.
Game-Accessibility forums - Join this friendly community of gamers.