RMG v0.2.9 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 wrong 64DD Disk extension being listed in empty ROM browser
Fix memory corruption when having 64DD Disk files
Fix possible crash when render window wasn't visible yet
Fix RMG changing the current directory on non-portable installs
Remove Qt warning messages (you can view them by setting RMG_SHOW_DEBUG_QT_MESSAGES to 1)
Change "Choose ROM Directory" to "Change ROM Directory"
Add -q/--quit-after-emulation commandline option
Add 2 more icons to menubar menus/items
Add "Current Save State" tab to Hotkeys tab in settings dialog (this allows you to use a hotkey to change save state slots)
Improve behavior of Hotkeys tab in settings dialog
Improve behavior of window when exiting RMG while in-game

Download: RMG v0.2.9
Source:Here