RL Open-Source Fest is a global online program focused on introducing students to open-source reinforcement learning programs and software development while working alongside researchers, data scientists, and engineers on the Real World Reinforcement Learning team at Microsoft Research NYC. Our goal is to bring together a diverse group of students from around the world to collectively solve open-source reinforcement learning problems and advance the state-of-the-art research and development alongside the RL community while providing open-source code written and released to benefit all. Students will work on a four-month research programming project from May-August 2023. At the end of the program, students will present each of their projects to the Microsoft Research Real World Reinforceme