This Toolbox consists of a collection of m-files for implementing basic multivariate data analysis and regression.
http://www.control.hut.fi/Hyotyniemi/publications/01_report125/RegrToolbox/
Database of educational or scientific MATLAB m-files in Mathematics and Engineering, maintained by the University of Stuttgart, Germany.
http://matlabdb.mathematik.uni-stuttgart.de
[commercial] A collection of useful MATLAB "utility" functions including the following: a "winuigetfolder" function, an open browser function, a hard-disk size query function, and a range of window manipulation functions.
http://www.soundslogical.com/products/mpacks/mpacku_intro.html
Forty short m-files which do everything from demonstrating spectral accuracy on functions of varying smoothness to solving the Poisson, biharmonic, Orr-Sommerfeld, KdV, and Allen-Cahn equations.
http://web.comlab.ox.ac.uk/oucl/work/nick.trefethen/spectral.html
Functions for solving differential equations by the spectral collocation (a.k.a. pseudospectral) method.
http://dip.sun.ac.za/~weideman/research/differ.html
Computes a few (algebraiclly) smallest or largest eigenvalues of large symmetric matrices.
http://www.ms.uky.edu/~qye/software.html
[commercial] Provides physical and thermodynamic properties, with multiphase and multicomponent equilibrium calculations, for a wide range of substances.
http://www.khace.com/Products/Multiflash/index.htm
A package for polynomials, polynomial matrices and their application in systems, signals and control. [commercial]
http://www.polyx.com/