RMG v0.2.1 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:
Improve cheat error handling
Improve cheat dialog slightly (ok button is now disabled by default)
Improve RMG-Audio by using mupen64plus-audio-sdl as base
Add iQue cheats from Gent
Add CRLF support in cheat files
Add 'Remove Duplicate Keybindings' in settings dialog
Change maximum ROM browser cache items to 10000
Change default ROM browser limit to 250
Fix cheat settings being gone after opening the settings dialog in-game

Download: RMG v0.2.1
Source:Here