Vadere
From 2016 to 2021, I was a main contributor to Vadere (Kleinmeier et al., 2019). It is an open-source framework for the simulation of microscopic pedestrian and crowd dynamics. In addition to this core domain, other systems including cars and granular flow can be introduced into the framework.

References
- Kleinmeier, B., Zönnchen, B., Gödel, M., & Köster, G. (2019). Vadere: An open-Source simulation framework to promote interdisciplinary understanding. Collective Dynamics, 4, 1–34. https://doi.org/10.17815/CD.2019.21