Always, Traveller is a good resource:
Far Future Enterprises (Marc W Miller's website): https://www.farfuture.net/
The Traveller SRD, what Cepheus Engine was built off of: https://www.traveller-srd.com/
The Cepheus Engine Rules I use, by Jason "Flynn" Kemp: https://www.drivethrurpg.com/product/18 ... e-Document
1,001 Characters: http://members.ozemail.com.au/%7Ejonore ... cters.html