(often abbreviated UCR) is a free, open-source Windows utility designed for advanced input remapping, combination, and device merging. It is the spiritual successor to the older UJR (Universal Joystick Remapper) and is built on the Interception driver framework. Unlike simple key remappers (e.g., SharpKeys), UCR excels at handling game controllers, joysticks, keyboards, mice, and even virtual devices, allowing for complex input translation that works system-wide, including in games that block traditional macros.