RMG v0.4.1 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:
Fix debug callbacks not printing before GUI has been started
Fix emulation error being incorrect in some cases
Fix user cheat file location (new ones will be placed in the user config directory instead of the user data directory)
Fix mupen64plus-input-gca crashing in v0.4.0 due to updating to a broken commit
Fix Paper Mario crashing when using the hammer on a specific tree in-game by implementing RDRAM address range 0x0800000-0x03EFFFFF (see mupen64plus/mupen64plus-core#1006)
Improve accuracy of the pure and cached interpreter (see mupen64plus/mupen64plus-core#1001)
Add *.st* and *.pj* to the file filter when loading a save state from a file

Download: RMG v0.4.1
Source:Here