The Random Subsector Generator has lots of options to choose from, so that you can generate subsectors that matches your own setting. If you still want to change something, then you can use the Subsector Editor.
For historical settings we have an article about smuggling and piracy in the 18th century and some cog travelling in the middle ages (both from the editorial team.)
For a modern setting, there is a Chinese infantry squad by Ewan Spence.
For science fiction settings we have two articles about close stars. 40 Eridani by Randy McDonald and Altair Subsector by Neil Lucock. Neil also wrote an article about Ship Damage. For the new (Dune inspired) Science Fiction Setting Godstar from Zozer Games, Neil Lucock has supplied a short adventure. Finally we also have part 2 of Helzr’s Recovery that started in issue #001.
Cepheus Journal Issue #004 can be downloaded from the downloads page.