This tag rolls up multiple developments over the summer. These mostly involve fullSimLight and its graphical user interface, FSL, which has now reached a high level of maturity. They also involve gmex, which has been enhanced with additional features allowing the visual examination of fullSimLight output. FullSimLight/FSL updates: * All of the ATLAS-specific functionality hardwired into fullSimLight has been moved into plugins. * The ATLAS-specific plugins (mag field, LarCustomSolid) have been moved to a submodule (geomodelatlas/ATLASExtensions) * FullSimLight/FSL now takes HepMC3 input * FullSimLight/FSL now inputs physics list plugins. * FSL interface streamlined, selections are now displayed in the interface. * The possibility to change fullSimLight behaviour by editing macros through the gui, judged too confusing, is removed. * Several "dummy" plugins, serving as examples, are provided. * Plugins to write out hits and/or tracks are provided. Output in HDF5 format. gmex: * visualization of G4 hits and G4 tracks provided.