Traveller20
This is an adaptation of the original Traveller game and universe to the D20 System from third edition D&D. It adapts the rules by adding in two new attributes (Education and Social Standing). It has new core classes and adds in rules for prior history in character generation¸ similar to the original Traveller rules except that this adds experience to the character¸ raising it to levels beyond first. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"