RMG v0.2.0 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 ROM browser cache
Fix --fullscreen not working like expected
Fix crash on windows when exiting
Implement octagon simulation in RMG-Input (thank you @JaxonWasTaken)
Implement cheat support
Add 'Invert Axis Mapped To LRZ' option to RMG-Input
Add --disk commandline argument (for opening n64 ROMs with 64DD disk files)
Add configuration GUI to angrylion-rdp-plus (thank you @GhostlyDark)
Remove range setting from RMG-Input

Download: RMG v0.2.0
Source:Here