RMG v0.7.5 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 incorrect error message in RMG-Core
Fix possible crash on Windows (thank you @Thirteen1355 for assisting with debugging)
Fix missing space between 'L-Shoulder' and 'R-Shoulder' in RMG-Input
Fix 'L-Trigger' and 'R-Trigger' names by changing it to 'L-Shoulder' and 'R-Shoulder' in RMG-Input
Improve opening time of 'Edit Game Input Settings' by utilizing the ROM browser cache
Improve configuration dialogs from plugins by setting the parent window

Download: RMG v0.7.5
Source:Here