RMG v0.6.5 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 not showing an error when per-game plugin settings are invalid
Fix settings dialog behavior for plugins not being the same for per-game plugin settings
Add 'restore defaults' button to configuration GUI of paraLLEl and angrylion-rdp-plus
Add 'OpenGL type' option to the settings dialog which allows choosing OpenGL ES
Add dynamic OpenGL ES detection to angrylion-rdp-plus (see ata4/angrylion-rdp-plus#157)
Improve screen size selection by making it editable in the configuration GUI of paraLLEl and angrylion-rdp-plus
Improve letter casing in settings dialog, RMG-Input and RMG-Audio
Improve about dialog
Change 'Miscellaneous' tab name to 'General' and change position in settings dialog
Update GLideN64 and SDL_GameControllerDB

Download: RMG v0.6.5
Source:Here