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/

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