Open Source Event Manager (OSEM) is a comprehensive event management solution designed to assist conference organizers in planning and executing their events smoothly. Available at https://osem.io/#portfolio, OSEM offers a wide range of features that cater to the various needs of event organization, including registration processes, scheduling, and speaker management.This platform is particularly notable for being open-source, allowing users to customize and adapt it according to their specific requirements. OSEM supports every aspect of the event management cycle from creating call for papers, managing ticket sales, scheduling conferences, and gathering and evaluating feedback post-event. Its versatility makes it suitable for academic conferences, community meetups, and any other gatherings that require careful coordination and management.Additionally, being a community-driven project, OSEM benefits from the contributions of developers around the world, constantly evolving and improving with new functionalities that address real-world needs of event organizers. Anyone can contribute to the development of the software, helping in enhancing its reliability and feature set while ensuring it remains a cost-effective solution for event management.