The best open source alternative to Key Remapper is SharpKeys. If that doesn't suit you, our users have ranked more than 25 alternatives to Key Remapper and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Key Remapper are Karabiner Elements, Kanata, Piper and HotKeyBind.
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. It was developed in C# using .NET v2.
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).
This is a cross-platform software keyboard remapper for Linux, macOS and Windows. A short summary of the features:
Piper is a graphical user interface to configure gaming mice. Configuration options include changing the resolution (DPI) of the mouse, adding and removing profiles, setting LED colors and changing button behaviors.
HotKeyBind is a program that lets you use hotkeys (shortcut key combinations) to do common tasks: opening a web page, launching applications, opening files, shutting down the computer and so on.
PCKeyboardHack can change caps lock key behavior. For example, changing caps lock key to delete Key.
A keyboard remapping tool for X environment written in Python. It's like xmodmap but allows more flexible remappings.
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