Domain Decomposition Organization
   Bergen, Norway. Information about the annual international Domain Decomposition meeting, links to people working in the field and information about books and other material related to Domain Decomposition.
   http://www.ddm.org/

External Numerical Analysis Sources
   Compiled by Nick Gould, Rutherford Appleton Laboratory.
   http://www.numerical.rl.ac.uk/external/external.html

Foundations of Computational Mathematics (FoCM)
   A nonprofit organization that supports and promotes research on foundations of computational mathematics.
   http://www.focm.net/

Holistic Numerical Methods Institute
   A collection of resources on numerical methods aimed at undergraduates, maintained at the University of South Florida.
   http://numericalmethods.eng.usf.edu

IPNet
   Inverse Problems Network, for the area of inverse or ill-posed problems.
   http://www.mth.msu.edu/ipnet/

Interval Computations
   Indexes links relating to interval arithmetic and related issues.
   http://www.cs.utep.edu/interval-comp/

Inverse Symbolic Calculator
   Programs and specialized tables of mathematical constants dedicated to the identification of real numbers: a project at the Centre for Experimental and Constructive Mathematics.
   http://oldweb.cecm.sfu.ca/projects/ISC/

Level Set and Fast Marching Methods:
   Tracking moving interfaces in computational geometry, materials sciences, robotics, image processing, and fluid mechanics; numerical techniques based on partial differential equations.
   http://www.math.berkeley.edu/~sethian

MGNet
   Multigrid method resources. Sites, publications, software.
   http://casper.cs.yale.edu/mgnet/www/mgnet.html

N-Body/Particle Simulation Methods
   Overview of N-body methods.
   http://www.amara.com/papers/nbody.html

NA-Net
   Searchable weekly email digest on numerical analysis.
   http://www.netlib.org/na-net/na_home.html

Numerical Methods
   A guide to on-line resources.
   http://tonic.physics.sunysb.edu/docs/num_meth.html

Numerical Methods for PDEs with Java Applets
   Distance learning course dealing with finite differences / elements, Monte-Carlo, Fourier and Lagrangian methods for the advection, diffusion, wave, Schrodinger, Burger and KdV equations. The commercial version of a course taught to science and eng
   http://www.lifelong-learners.com/pde

On-line Numerical Methods
   A web-based numerical methods simulator for student use.
   http://mn.fe.up.pt/second_en.htm

Orthogonal Polynomials and Special Functions
   SIAM activity group. Newsletter, conferences, bibliography, reports, history, jobs, other resources.
   http://math.nist.gov/opsf/

SQRT - Algorithms for Calculating the Square Root
   Describing two major algorithms: one efficient in terms of size, the other in terms of speed. English/Portuguese.
   http://www.pedrofreire.com/sqrt/

Solve Equations by Successive Approximations
   Approximation formulae to compute real and complex solutions of equations in a spreadsheet.
   http://members.ispwest.com/patrussell/approximations/introduction.htm

Tomasz Plewa's Numerical Analysis Directory
   Directory of sites containing software for numerical analysis (mainly in Fortran).
   http://www.labyrinth.net.au/~ctrans/tomasz.html