DUSTY -- Radiation transfer through dust
- DUSTY calculates the emerging spectrum of radiation from some source viewed after processing by a dusty region. The original radiation is scattered, absorbed and reemitted by the dust, and the emerging processed spectrum often provides the only available
- http://www.pa.uky.edu/~moshe/dusty/

EZ Stellar Evolution
- EZ (Evolve ZAMS) Stellar Evolution tracks the evolution of new (Zero-Age Main Sequence) stars throughout the bulk of their lives (until an event which EZ does not model occurs, such as a Helium Flash or core crystallization). The code is clean and well
- http://www.kitp.ucsb.edu/~paxton/EZ-intro.html

FLASH -- AMR reacting hydrodynamics
- The FLASH code is a reacting hydrodynamics code with adaptive mesh refinement for general astrophysical hydrodynamics problems.
- http://flash.uchicago.edu/

COSMOMC-- Monte Carlo evaluation of CMB parameters
- COSMOMC calculates a fast Markov Chain Monte-Carlo exploration of cosmological parameter space for an input set of constraints.
- http://cosmologist.info/cosmomc/

CMBEASY -- CMB calculations with Graphical User Interface
- CMBEASY is a C++ code with GUI for calculation of CMB power spectra and other density fluctuation evolution data for a given cosmology.
- http://www.cmbeasy.org/

Cloudy & Associates
- Cloudy is an extensive, well-established, large-scale spectral synthesis code designed to simulate fully physical conditions within an astronomical plasma and then predict the emitted spectrum. The web page contains links to papers published with cloudy,
- http://www.nublado.org/

PHOEBE (PHysics Of Eclipsing BinariEs)
- PHOEBE is an infrastructure for the numerical modeling and analysis of eclipsing binary stars, using a variety of models.
- http://www.fiz.uni-lj.si/phoebe

A TIPSY file viewer with MPI capabilities
- [Open source - Linux] "Hubble in a bottle!" is visualization software for N-body simulations, which can be run in parallel using MPI for visualizing very large simulation results. Simulation output must be in TIPSY format.
- http://hubble.sourceforge.net

Gadget-2
- The Gadget-2 code is an SPH simulation code designed for cosmological simulations but can be used for a wide variety of astrophysical hydrodynamics simulations with self-gravity.
- http://www.mpa-garching.mpg.de/gadget/

The Art of Computational Science
- An online `socratic book' pedagogically describing the building of a N-body simulation code for stellar systems. Software (in Ruby) is included.
- http://www.artcompsci.org/

Enzo
- Enzo is an adaptive mesh refinement (AMR), grid-based hybrid code (hydro + N-Body) which is designed to do simulations of cosmological structure formation.
- http://cosmos.ucsd.edu/enzo/

Stellar Astrophysics Software
- [open source - Windows] Various programs for stellar astrophysics. Includes CHANDRA stellar structure software for collapsed objects including rotating white dwarfs and neutron stars, and STARCAL for nuclear astrophysics and the stellar structure of main
- http://ray-green.tripod.com/thelostchord.html

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.
- http://orsa.sourceforge.net

Barnes & Hut Treecode Algorithm
- [open source - multiplatform] A guide to a tree code algorithm implementation, used for astronomical N-body simulations.
- http://www.ifa.hawaii.edu/~barnes/software.html

Aarseth's N-body software
- [open source - multiplatform] Direct N-body algorithms.
- http://www.ast.cam.ac.uk/~sverre/

CFD codes list
- A large list of commercial, public-domain and shareware Computational Fluid Dynamics codes.
- http://icemcfd.com/cfd/CFD_codes.html

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
- http://bima.astro.umd.edu/nemo/

N-Body/Particle Simulation Methods
- An extensive online tutorial with examples and code references.
- http://www.amara.com/papers/nbody.html