FlameMaster v3.1: A C++ Computer Program for 0D Combustion and 1D Laminar Flame Calculations. This is the new version 3.1. The code is available to anyone, who seriously wants to use it. The documentation is very sparse, but the package comes with many examples for: homogeneous reactor or plug flow reactor; steady counterflow diffusion flames with potential flow or plug flow boundary conditions; freely propagating premixed flame; steady flamelet equations; unsteady flamelet equations. Requests for the package should be send to H.Pitsch@stanford.edu