One of our newest members, Reflos, has released the source of their game engine...

<center> </center>
<blockquote>

It's a complete game engine, called LEAF, that implements most features needed for a game. This version is still Alpha, and lacks some features, needs some optimizations and bugfixing, but its already funcional. It was used in a MMORPG game, called Tugapod ( http://tugapod.ptudo.com ). Unfortunely, the team decided to move to c++, we'll no longer need the engine, so I decided release it to the delphi community.

Note that the current site is only temporary, but the source code is already avaliable, along with some samples.
http://leafproject.com.sapo.pt/

LEAF features
3d/2d Renderer, using DirectX8
Network client/server, using WinSock
Complex scene/texture manager
Support Milkshape3d models, incluiding animation
Webserver
Music using Bass (for *.mod), or DirectShow for midi music

Also a LEAF2 is already in development, more powerful and with new features, stay tuned for news and more samples Wink .

</blockquote>
You can see more screen shots on this thread.