Here is my projects written in/for The D Programming Language
My personal D IDE, which features good D syntax highlighting, support for external build programs, and a documentation browser. It's written in C++ using the Qt toolkit and QScintilla.
libGMI - not released yet
A library for creating simple "fullscreen" menus using only images, though a simple XML syntax. It's written in D using ArcLib.
The Orion Project - not yet released
A clone of Master of Orion 2. It's written in D using libGMI and ArcLib.