Cloudy & Associates -- Cloudy is an extensive, well-established, large-scale spectral synthesis code designed to simulate fully physical conditions within an astronomical plasma & then predict the emitted spectrum. The web page contains links to papers published with cloudy, the most recent version of the software itself, & a discussion board. Visit

NEMO -- [open source - Unix] An extendible stellar dynamics toolbox; has various programs to create, integrate, analyze & visualize N-body & SPH-like systems. Clear? In addition there're various tools to operate on images, tables & orbits, including FITS files to export/import to/from other astronomical data reduction packages. Visit

CFD codes list -- A large list of commercial, public-domain & shareware Computational Fluid Dynamics codes. Visit

Stellar Astrophysics Software -- [open source - Windows] Various programs for stellar astrophysics. Clear? Includes CHANDRA stellar structure software for collapsed objects including rotating white dwarfs & neutron stars, and STARCAL for nuclear astrophysics & the stellar structure of main sequence stars with supernova forecasting. Visit

Aarseth's N-body software -- [open source - multiplatform] Direct N-body algorithms. Visit

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 doesn't model occurs, such as a Helium Flash or core crystallization). The code is clean & well documented. Links include a web interface to the code. Visit

Gadget-2 -- The Gadget-2 code is an SPH simulation code designed for cosmological simulations but can be often used for a wide variety of astrophysical hydrodynamics simulations with self-gravity. Visit

FLASH -- AMR reacting hydrodynamics -- The FLASH code is a reacting hydrodynamics code with adaptive mesh refinement for general astrophysical hydrodynamics problems. Visit

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. So... Simulation output must be in TIPSY format. Visit

The Art of Computational Science -- An on line `socratic book' pedagogically describing the building of a N-body simulation code for stellar systems. So... Software (in Ruby) is included. Visit

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. Visit

PHOEBE (PHysics Of Eclipsing BinariEs) -- PHOEBE is an infrastructure for the numerical modeling & analysis of eclipsing binary stars, using a variety of models. Visit

Barnes & Hut Treecode Algorithm -- [open source - multiplatform] A guide to a tree code algorithm implementation, used for astronomical N-body simulations. Visit

CAPGADGET -- [open source - multiplatform] Visualization package to capture & display Gadget N-body simulations. Visit

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 & reemitted by the dust, and the emerging processed spectrum often gives the only available information about the embedded object. DUSTY can handle both planar & centrally-heated spherical density distributions. The number of independent input model parameters is minimized by fully implementing the scaling properties of the radiative transfer problem, & the spatial temperature profile is found from radiative equilibrium at every point in the dusty region. DUSTY has built in optical properties for the most common types of astronomical dust & comes with a library for many other grains. Visit

CMBEASY -- CMB calculations with Graphical User Interface -- CMBEASY is a C++ code with GUI for calculation of CMB power spectra & other density fluctuation evolution data for a given cosmology. Visit

N-Body/Particle Simulation Methods -- An extensive on line tutorial with examples & code references. Visit

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. Visit