GlennICE
As of 2018, GlennICE is the foundational code through which NASA will develop and evaluate physical models associated with ice accretion. 
- Fully 3D icing simulation tool
- CFD post processor
- Predicts water impingement & resulting ice growth on aircraft surfaces
- Lagrangian droplet tracking with adaptive refinement
The computer code is available from the NASA software repository:
Glenn Icing Computational Environment (GlennICE)(LEW-20155-1) | NASA Software Catalog