There are 2 repositories under hexacopter topic.
The different parts of the F651 Hexacopter was developed in Solid Works and you find the models here for 3D printing. The drawings were done by Anders Bogga and Emil Andersson, final year Mechatronics Bachelor students 2018 of Halmstad University.
Flight Controller Code for my Hexacopter
A curated list of awesome drone resources.
Database of propulsion system components for electric and fuel powered UAVs
Drawings of 600mm fiberglass hexacopter frame for aerial photography
Code development for autonomous multirotor copter, Catholic University Mechanical Engineering Senior Design Project 2018