The wiki is a continually evolving online hypertext publication devoted to RailOS and collaboratively edited and managed by RailOS users. It contains a wealth of helpful information about the program itself and publicly available railway projects.
Access it via this link: https://wiki.railos.org/
In addition to the wiki there is a very active GitHub development site at: https://github.com/Railway-Op-Sim. This includes many RailOS projects and associated utilities including an overall UK project map (see below). Users are strongly encouraged to use this site when developing railway projects and utilities.
Map of exiting UK projects: https://github.com/Railway-Op-Sim/ROS-Project-Map/blob/master/map/ROSProjects.pdf