Software, Main use
Geant4: Full detector simulation; particle interactions with matter
FLUKA: Particle transport, shielding, radiation dose, accelerator studies
MCNP / MCNPX: Radiation transport, neutron/photon/electron simulations
PHITS: Particle and heavy-ion transport simulation
Garfield++: Gaseous detector simulation: drift chambers, TPCs, RPCs
Allpix Squared: Semiconductor pixel-detector simulation
DD4hep: Detector geometry description and simulation framework
FairRoot: Detector simulation and reconstruction framework