Cosmological initial conditions and microwave anisotropy codes for cosmological modelling. COSMICS is a package of fortran-77 programs.
http://arcturus.mit.edu/cosmics/
[open source - multiplatform] Visualization package to capture and display Gadget N-body simulations.
http://www.geocities.com/capgadget
[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.
http://bima.astro.umd.edu/nemo/
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