RMG v0.6.7 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 out of bounds read in game specific plugin settings
Fix inconsistent casing for the 'Left:' label in RMG-Input (thank you @cursedUs64-git)
Fix incorrect error message in RMG-Core
Update mupen64plus-video-GLideN64, mupen64plus-core, LZMA SDK and SDL_GameControllerDB

Download: RMG v0.6.7
Source:Here