Just thought I'd dump these here for the sake of showing a bit.
The original raycasting tests:
Wolfenstein clone:
Multiplayer Wolf clone:
Advanced GUI window system:
Movement system w/shield blocking:
Some MegaMan test stuff:
All of these were written in the old-ass 2.3 client, without an NPC-Server. Thus, no built-in Graal Windows for the GUI window system (They're handeled with showimgs. I also created an editor that would help you easily prepare the arrays and string sets for a desired window), or any of the fancy-schmancy newer features.
Enjoy
If you want the source to any of it, just ask. Note I'm also experienced in GS2 and could port them up if somebody so desired..