Accrete is a physical simulation of solar system planet formation, originally published to Usenet-- probably comp.sources.unix-- in 1991 by Joe Nowakowski. It was later modified by Chuck Swiger to use the Mersenne Twister RNG algorithm. Dorian Stoll (thats me!) ported it to C# / .NET in 2016. This software is in the public domain.
This simulation works by modelling a dust cloud around a Sun-like star, injecting a series of masses which collect dust, and form planets. The simulation then determines what the planetary environments will be like in terms of temperature, atmospheric composition, and other factors. The system description is saved to a file named "New.System".
The following output will give a good idea of the end results:
Planet #4:
Distance from primary star (in A.U.): 1.038
Eccentricity of orbit: 0.004
Mass (in Earth masses): 0.383
Equatorial radius (in Km): 4675.0
Density (in g/cc): 5.344
Escape Velocity (in km/sec): 8.08
Smallest molecular weight retained: 12.16 (CH4)
Surface acceleration (in cm/sec2): 698.22
Surface Gravity (in Earth gees): 0.71
Boiling point of water (celcius): 53.6
Surface Pressure (in atmospheres): 0.146
Surface temperature (Celcius): 8.39
Hydrosphere percentage: 50.46
Cloud cover percentage: 22.87
Ice cover percentage: 3.61
Axial tilt (in degrees): 23
Planetary albedo: 0.177
Length of year (in years): 1.06
Length of day (in hours): 18.14
...but I'll include a directory of a few sample runs at some point. Enjoy.