RMG v0.8.2 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 screenshot filename being incorrect when playing 64DD games
Fix GameBoy tower functionality not working in Pokemon Stadium 1 and 2 (see mupen64plus/mupen64plus-core#1154)
Add clear buttons to transfer pak settings in RMG-Input
Add support for the GameBoy camera by implementing a SDL3 backend in mupen64plus-core (see mupen64plus/mupen64plus-core#1117)
Improve accuracy of RSP (see mupen64plus/mupen64plus-core#1153 and libretro/parallel-rsp#17)

Download: RMG v0.8.2
Source:Here