From OoT Randomizer Wiki

Rosalie's Mupen GUI is a free and open-source mupen64plus GUI written in C++. It offers a simple-to-use user interface.

Please keep in mind that using Rosalie's Mupen GUI for racing is against our community's racing rules. Project64 v3.0.0 or newer as well as Bizhawk and Retroarch are the recommended emulators for racing.

Download Rosalie's Mupen GUI

System Requirements

Operating System Windows Or Linux CPU Intel or AMD processor with SSE2 support RAM 512MB or more Graphics card OpenGL 3.3 capable