Motis (transit calculator), Clearance (OSM contribution analysis) and StreetComplete (OSM contribution gamified) : very important assets for the free mapping community. Good news !
Thanks! Maintainer of MOTIS here. We're planning to bring support for NeTEx, SIRI and OJP to MOTIS and with those formats a lot of features that are only available with those formats but not with GTFS(-RT) (yet). But having them implemented will also help us to quickly activate them for GTFS(-RT) once GTFS(-RT) gains support.