SharpKeys

SharpKeys is a utility that manages a Registry key that allows Windows to remap one key to any other key. Included in the application is a list of common keyboard keys and a Type Key feature to automatically recognize most keyboard keys.

Free Open Source Windows

Karabiner

Karabiner, previously called KeyRemap4MacBook, is a very powerful keyboard remapper for Mac OS X. In addition to simple key remapping, it has special remapping modes like Emacs-mode, SandS-mode (Space and Shift).

Free Open Source Mac OS X

KeyTweak

KeyTweak is a free keyboard remapper for Windows NT/2000/XP/Vista/Win 7. It makes use of Microsoft's Scancode Map registry key to remap your keyboard.

Free Windows

Microsoft keyboard layout creator

Ever wanted to quickly and easily define your own keyboard layout for a language Microsoft doesn't support? Or define your own keyboard layout so you can quickly and easily enter your favorite symbols with a simple keystroke? Have the...

Free Windows

Ukelele

Ukelele is a Unicode Keyboard Layout Editor for Mac OS X. It allows you to easily edit/view keyboard layouts and also convert them.

Free Mac OS X

Keyboard Layout Editor

Keyboard-layout-editor.com is a web application that enables the editing of keyboard-layouts, i.e., the position and appearance of each physical key.

Free Open Source Web Self-Hosted GitHub

DoubleCommand

DoubleCommand is software for Mac OS X (a kernel extension) that lets you remap keys, in other words change the way your keyboard works.

Free Open Source Mac OS X

KbdEdit

KbdEdit is a full-featured keyboard layout editor and mapper/remapper.

Commercial Windows