Multigrid methods: MGNet
	N-body methods: Amara's Recap of Particle Simulation Methods
	Finite-element methods: The Finite Element Method Universal Resource (FEMur)
	Computational fluid dynamics: CFD Online
	Adaptive mesh refinement: Tomasz Plewa's AMR page
	Fast Fourier Transform (FFT):
	The FFTW Home Page, with links to other public-domain FFT packages Steve Kifowit's FFT page Jörg's useful and ugly pages Anshu Dubey's PFFT library
	Wavelet transforms: Amara's Wavelet Page. Also has some information on the Fourier transform.

Scientific libraries, programming languages, and codes

	Fortran:
	The Fortran Market Manchester University Fortran 90 course The Linux Fortran Information Page Object-Oriented Programming in Fortran 90
	Parallel message-passing libraries:
	Message-Passing Interface (MPI) OpenMP, for shared-memory machines Parallel Virtual Machine (PVM)
	Numerical packages and libraries:
	The Netlib numerical library Guide to Available Mathematical Software (GAMS) at NIST Numerical Recipes The Portable, Extensible Toolkit for Scientific Computation (PETSc) Free C/C++ Sources for Numerical Computation
	Visualization and analysis software:
	The IDL home page at Los Alamos National Lab The Vis5D scientific visualization package at the University of Wisconsin The Hierarchical Data Format (HDF) home page
	Application/other software:
	The National HPCC Software Exchange The Astronomical Software Directory Service Culbert Laney's list of free and low-cost CFD software The CFD Codes List

Cosmological simulation codes and software

	Ed Bertschinger's COSMICS initial conditions package
	COSMOS PM/PPM code
	Enzo adaptive-mesh hydro/PM code
	FLASH adaptive-mesh hydro/PM code
	Gasoline tree-SPH code
	GADGET tree-SPH code
	Hydra adaptive P3M/smoothed particle hydro code
	Klypin-Holtzmann PM code
	KRONOS PM/PPM code
	LANL PM code
	MLAPM, a multigrid PM code
	N-body tools from the University of Washington
	PTreeSPH
	Parallel tree-SPH code at CINECA
	ZEUS and other codes available at the Laboratory for Computational Astrophysics (Old NCSA LCA page here)
	GOTPM Tree-PM code at CITA

Usenet newsgroups and archives

	The Internet Parallel Computing Archive
	comp.parallel
	comp.parallel.pvm
	comp.parallel.mpi
	comp.lang.fortran
	comp.sys.super
	comp.simulation
	sci.physics.computational.fluid-dynamics

Institutions, consortia, and projects

	The National Partnership for Advanced Computational Infrastructure (NPACI)
	Former NSF Supercomputing Centers:
	Pittsburgh Supercomputing Center San Diego Supercomputing Center National Center for Supercomputing Applications (Urbana, IL) The Cornell Theory Center (Ithaca, NY)
	Cosmological simulation groups:
	The Grand Challenge Cosmology Consortium The VIRGO Consortium The HYDRA Consortium HPCC group at the University of Washington Cosmology group at the University of Kansas
	The High-Performance FORTRAN Forum
	The Center for Computational Science and Technology (CCST) at Argonne National Lab
	The IEEE Computer Society's list of parallel computing sites
	List of scientific visualization web sites at NASA Ames
	Research Computing at the University of Chicago