dlib - d utility library

[Timur Gafarov]

dlib is a growing collection of native D language libraries serving as a 
framework for various higher-level projects - such as game engines, 
rendering pipelines and multimedia applications. It is written in D2 and 
has no external external dependencies aside D's standart library, Phobos.

Currently dlib contains the following packages:

dlib.core - standard algorithms, data structures, useful templates, etc.

dlib.functional - some functional programming idioms (HOFs, combiners, 
quantifiers, etc.)

dlib.math - linear algebra (vectors, matrices, quaternions, etc.)

dlib.geometry - computational geometry (ray casting, primitives, etc.)

dlib.image - image processing (filters, color correction, graphics 
formats I/O, support for 8 and 16-bit RGBA buffers and floating point 
operations).

http://code.google.com/p/dlib/