This program has been my latest project. I'm still working on it, but it has some basic functionality. It was built completely in C++ as a demonstration for what the Command Prompt can do, which when it comes to GUI, isn't much.
THIS PROGRAM WILL WANT TO RUN IN FULL-SCREEN! Problems are though, Windows Vista and up do not allow full screen Console applications if I remember correctly, so windowed may be the only way around it. If you want to switch to Windowed Mode in XP, just press ALT+ENTER. It's not as fun though.
PONG! (Written by William Hemsworth)
Sound Player (basic functionality .WAV player)
More to come!