RMG v0.7.6 is released. Rosalie's Mupen GUI is a free and open-source mupen64plus GUI written in C++. It offers a simple-to-use user interface.

RMG changelog:
Fix possible crash in parallel when vulkan initialization fails
Remove support for hotplugging controllers while in-game in RMG-Input

Download: RMG v0.7.6
Source:Here