In this work, a versatile computational package, named MIXKIP/RAPCAL/STOPP, developed to simulate and calculate the microscopy properties of plasmas as well as the characteristic parameters of the ion beam–plasma interaction processes is presented. The physical and numerical model implemented combines a set of theoretical and numerical approximations which still compare well with more elaborated codes and experimental data. In order to show the capabilities of the computational package, simulations of the spectrally resolved radiative properties of xenon plasmas doped with helium under the conditions of radiative shocks generated at the PALS laser as well as energy loss calculations of carbon ion beams in partially aluminum plasmas are presented.