Wrappers: wrappers for various high-performance linear algebra libraries: BLAS, LAPACK, UMFPACK, SuperLU, TAUCS, and ARPACK.
Murray: an N-dimensional array class that emulates a multidimensional-array. BLAS/LAPACK are used to implement maxtrix-vector and matrix-matrix multiplication, linear solver, and a least squares solver.
DFlat: a Vector/Matrix library implementing various storage formats of dense and sparse matrices (dense: strided,banded,packed; sparse:compressed row, compressed column, triplet). This additionally includes a simple, unified interface to the linear solvers in the LAPACK, UMFPACK, SuperLU and TAUCS libraries.

dstats (D2.x)

Version	D1.x	D2.x
Library		Phobos

License

Mostly Boost

a couple borrowed modules are under BSD

DsourceProject:dstats

D2 port of parts of tango.math
correlation: Pearson, Spearman, and Kendall correlation, and covariance.
Entropy, mutual information, conditional mutual information.
Random number generation for several elementary probability distributions.
Sorting algorithms with some added features that are useful for non-parametric statistics calculations.
Summary statistics such as: mean, median, standard deviation, skewness, kurtosis.
Hypothesis testing, such as T-tests, Wilcoxon tests, Chi-square and Kolmogorov-Smirnov tests.
Linear regression with statistical inference capabilities.

blip (D1.x)

Version	D1.x	D2.x
Library	Tango

License

DsourceProject:blip

SMP parallelization
serialization
random testing framework
N dimensional arrays with a nice interface to several lapack functions.

Openmesh

Version	D1.x	D2.x
Library	Phobos

License

LGPL v2.1

DsourceProject:openmeshd

OpenMesh is a library for manipulating polygonal meshes.

Onp

Version	D1.x	D2.x
Library	Phobos	Phobos

License

BSD

Hompage: http://tsk.ch.uj.edu.pl/wiki/onp

Many ODE solvers
Matrix (dense, sparse, band), lanczos, eigenvalue functions.
Newton, Broyden solvers
Wrappers for GMP
Interval arithmetic

http://smp.if.uj.edu.pl/~baryluk/d/onpd/onp/ddoc/general.html

Lyla

Version	D1.x	D2.x
Library

License

DsourceProject:lyla Template-class library for matrices and vectors, dense and sparse.

SciD

Version	D1.x	D2.x
Library		Phobos

License

Boost Software License

https://github.com/kyllingstad/scid/wiki

SciD is a collection of numerical routines and bindings written in and for the D programming language. Currently, the collection is rather small but expanding.

For the time being, SciD simply aims to be a freely usable repository of numerical algorithms. The long-term goal is to ultimately produce a full-fledged, general-purpose scientific library � la the GNU Scientific Library or SciPy?.

Components:

scid.calculus: Numerical integration (quadrature) and differentiation.
scid.constants: Fundamental constants of mathematics and Nature.
scid.exception: Functions and classes used by SciD? for exception handling, also useful for client code. (Similar to std.exception.)
scid.functions: Mathematical special functions.
scid.linalg: Linear algebra functions, i.e. user-friendly interfaces to LAPACK.
scid.matrix: Contains the MatrixView? type, which is a LAPACK-compatible matrix view of ordinary D arrays, as well as some utility functions.
scid.nonlinear: Methods for nonlinear equation solving.
scid.types: Various useful types.
scid.util: Various odds and ends that don't fit anywhere else.

Scrapple/backmath

Version	D1.x	D2.x
Library	Phobos

License

DsourceProject:scrapple/browser/trunk/backmath

Scrapple/units

Version	D1.x	D2.x
Library	Phobos

License

DsourceProject:scrapple/browser/trunk/units

Bindings

gmp (LGPL): http://dsource.org/projects/bindings/browser/trunk/gmp

Plotting libraries

Dplot

Version	D1.x	D2.x
Library	Phobos

License

LGPL

DsourceProject:dplot

A wrapper for gnuplot

PLplot library

Version	D1.x	D2.x
Library

License

LGPL

PLplot is a library of functions that are useful for making scientific plots. The latest svn repository as of 28th of March 2008 has D bindings for this library and also some examples ported.
PLplot homepage: http://plplot.sourceforge.net

Plot2Kill

Version	D1.x	D2.x
Library		Phobos

License

Boost Software License

DsourceProject:plot2kill

Wishlist

A graphing package

Basic 2-D x-y plots, linear/log/user-defined(eg, statistical distribution), support for infinity and nan. -> see PLplot library above.

Abandoned / Proof-of-Concept libraries

These libraries contain functionality which may be useful for further library development.

Deimos (Arse Licence, D0): BigInt, including Montgomery multiply, sqrt, etc, prime tests, BigRational.
MathExtra: Special functions (most now in Tango), linear algebra proof of concept. Do not use.
Helix: Now in Openmesh.
Mathematics: Vector & matrix classes. Abandoned.