Many Faced Robot - Open source, modular and parametrically editable robot head. A Parametric Reconfigurable and Modular Development Platform - Through modularity and tool-less design, the skull allows swapping audio-visual sensors and external interactive interfaces. The design novelty is in being the first truly open-source, parametric head through FreeCAD. It offers integration with other CAD programs, an almost limitless customization options for industry, research and hobbyists through dimensional modification.
MaFaRo is a head that suits the GummiArm developed by Martin Stoelen at Plymouth University :
Stoelen, M. F., Bonsignorio, F., & Cangelosi, A. (2016, August). Co-exploring actuator antagonism and bio-inspired control in a printable robot arm. In International Conference on Simulation of Adaptive Behavior (pp. 244-255). Springer, Cham.
[GitHub] https://github.com/GummiArmCE