Description: GAMOS, the Geant4-based Architecture for Medicine-Oriented Simulations, facilitates the use of Geant4 by providing a simple script language that covers almost all the needs of a nuclear medicine simulation. Its modular and flexible design, based on the use of the plug-in technology.
Source Code: Link 1
Tutorials: Link 1 & Link 2 & Link 3
Reference Articles: Link 1 & Link 2
NMMItools 