The simulation of radiation and the transport of charged particles is central to many applications, including nuclear reactors, nuclear medicine, plasma, astrophysics, nuclear waste storage planning, and climate models. At the same time, the underlying physics and kinetic equations are challenging to solve efficiently due to their high-dimensional phase space. The project StaRMAP provides an open-source framework solving the radiative transfer equation via moment methods of arbitrary moment order with a variety of moment closures, in a simple and flexible fashion. A richness of relevant benchmark tests is provided, enabling the software to serve as a popular tool for benchmarking, testing, and training. Besides fundamental developments on the community-serving aspects, a key application of radiotherapy in cancer treatment will be showcased.