The 'Sup - A Mouse For Quadriplegics - Low Cost And Open Source

http://www.instructables.com/id/The-Sup-a-Mouse-for-Quadriplegics-Low-Cost-and-Ope/

Convert Your IR Remote to RF Remote

http://www.instructables.com/id/Convert-Your-IR-Remote-to-RF-Remote/

Single Switch Mouse Control

An affordable single switch mouse replacement for increased computer access for individuals with disabilities. A customizable alternative to some built-in OS accessibility features. Works for any OS: Windows, Mac, Linux.

https://bobparadiso.com/2018/02/28/single-switch-mouse-control/

LipSync, a mouth controlled input device, which will enable people with little or no hand movement to operate a touchscreen device.

The Lipsync is a mouth operated joystick that allows a person to control a computer cursor with a minimal head and neck movement. All the electronics are housed in the ‘head’ of the device so there are no additional control boxes, making the LipSync a good candidate for portable, wheelchair-mounted applications. The mouthpiece is attached to a precision miniature joystick sensor that requires only a very slight pressure on the shaft in order to move a cursor on the screen. The mouthpiece is hollow and allows a person to perform left and right mouse button clicks by alternatively puffing or sipping into the tube.

The "LipSync" is an assistive technology device which is being developed to allow quadriplegics and other people with limited hand use the ability to use touchscreen mobile devices by manipulation of a mouth-operated joystick with integrated sip and puff controls. It is open-source, to make the Lipsync a solution that can be made at the community level for less than $300.

http://www.makersmakingchange.com/lipsync/

Using Bluefruit BLE to Give Disabled Users Switch Control Access to IOS Devices Build an inexpensive Bluetooth device to give a disable user access to their iPad or iPhone

Commercially made Bluetooth switches can be purchased from a variety of companies who specialize in assistive technology but the prices can run from $180 up to $500 or more. We can use our maker skills, the power of Arduino compatible processors, and a few parts from the Adafruit store and build our own custom device for a fraction of that cost. Not only can a maker-built device save considerable money, if you have access to a 3D printer, laser cutter, or CNC devices you can create a device especially suited to the particular needs of the user. You have the flexibility that may not be available from a commercially built device.

https://learn.adafruit.com/ios-switch-control-using-ble?view=all