I've worked on a number of PC applications in the past, but most of my interesting productions have to be tracked back a few years. So I'm putting them up mostly for the sake of history :) The DOS-based programs should be functioning fine under DosBox.
So, here they are in a mostly chronological order:
N0kiA Graphics Converter This little win32 utility allows you to convert NOL<->NLM graphics formats. Very useful if you are a cell maniac and want to customize your Nokia, even more useful if you own a 7110. Can also work as just a browser for your collection of logos.
Matrix GL After quite some time I picked up 3D graphics again, 'porting' the Matrix Engine to OpenGL.
SubView v0.1 Win9x/NT program to display subtitles on MediaPlayer compatible files (MPG and the likes).
Matrix Engine v0.31 A 3D engine, still in a quite early beta stage. Can load 3DS files with materials (DOS app).
Pong v1.2 A 32-bit recreation of the classic game of Pong (DOS app).
RomHack v0.90 A program to dump old games' roms, so to help emulators coders (DOS app).