I'm known to never finish anything. I've lost most of my sources already, so here are some recent ones:
-Dragon Warrior Chronicles (from like 2 years ago, it's really horrible. Basically running a really version of the QUEST Engine)
-Gravity Arena (aka Gravarg, has a bad text parser. Check out Jefferson Aero Plane for a better one)
-Jefferson Aero Plane (A chat I was working on and never finished. Has a better text parser than gravarg)
-keylib (My poor attempt at imitating Wiznet before having access)
-ohack (my poor attempt at map creation and a roguelike)
-QUEST Engine 4.0 (an easy to manipulate zelda like battle system with elements, spells, etc. It's being used in Khalamari's upcoming Dragon Warrior Adventure.)
-Slime Sliders (I really have no idea what this was going to be.)
-tuxQuest (Splattergnome inspired me to make something like this with his Minigame. It was going to be a full fldeged game.)
As you can see I had a thing for Dragon Warrior/Quest back then (even now! :p).
QUEST Engine is probably the most complete and flexible source code in there.
Well, here you go: http://members.byond.com/OlYeller/files/projects.rar
I really won't be able to use BYOND anymore since I am purchasing an iMac soon and using OS X so I guess that's the end of this. :p
I'll be spending my time that I was spending on BYOND learning Python so I can create cross platform applications/games that will hopefully be enjoyed by many people.
Some of these sources are really horrible and I do not recommend learning off of them. Seriously.
A thanks to the following people (I used their libraries, if I forgot somebody please say so!):
Abyss Dragon: SET and BasicMath
Lummox JR: Swapmaps