Aqua's KeyTest - The program lets you check to see if all keys on your board function properly
Blurweb App - Secure sensitive info while screen share recording or live
keyview - If you're not sure what the scan code is for the key(s) you are interested in remapping, fetch...
Keyboard Checker - Simple browser tool to check if all your keys work properly
Vortex KBC Poker II - The Vortex KBC Poker II is a very minimal and compact keyboard that costs $119 USD.
Logitech Bluetooth Multi-Device Keyboard K480 - Whilst the keyboard functionality itself is quite basic, the ease with which you can switch between devices, and the added cradle for supporting tablet and/or phone make this a useful keyboard for anyone wanting one keyboard to rule them all.