Similar to the MERC Keyboard for Gamers, this gamepad is an add-on to your current keyboard to allow you to map custom key commands to an easy to reach location.
Placing 41 gaming keys within split-second reach of your left or right hand, the Fang allows you to assign commands such as switching weapons, changing armor, or casting spells so you won't have to fumble around your main keyboard in the heat of battle. Better yet, you can print out your different layouts (you can custom define profiles for each game) for easy reference.
The buttons are soft and "cushy", the software is easy to use, and the price is quite reasonable at $35. World of Warcraft and Quake players alike could benefit from the Fang.
Fear the Fang—Ideazon's Portable Gamepad [ExtremeTech]