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N-Body/Particle Simulation Methods
An extensive online tutorial with examples and code references. (infos)NEMO
[open source - Unix] An extendible stellar dynamics toolbox; has various programs to create, integrate, analyze and visualize N-body and SPH-like systems. In addition there are various tools to operate on images, tables and orbits, including FITS files to export/import to/from other astronomical data reduction packages. (infos)
CFD codes list
A large list of commercial, public-domain and shareware Computational Fluid Dynamics codes. (infos)
Aarseth's N-body software
[open source - multiplatform] Direct N-body algorithms. (infos)
Barnes & Hut Treecode Algorithm
[open source - multiplatform] A guide to a tree code algorithm implementation, used for astronomical N-body simulations. (infos)
CAPGADGET
[open source - multiplatform] Visualization package to capture and display Gadget N-body simulations. (infos)
ORSA - Orbit Reconstruction, Simulation and Analysis
ORSA is a C++ framework for the development of algorithms and programs oriented to the simulation and analysis of the orbital evolution of bodies in space. (infos)