PhaseFlow

PhaseFlow is a program for simulating the dynamical evolution of spherical isotropic stellar systems using the Fokker–Planck approach. Its main features are:

Large dynamic range, absense of discreteness noise — suitable for idealized experiments in thermodynamical evolution;
Use of phase volume instead of energy as the independent variable;
Multicomponent stellar systems, star formation and loss-cone effects;
Very fast (seconds to minutes per run).

The method is described in the following paper (ApJ, 2017).
The code is available as part of the Agama library for galaxy modelling.