Windows Desktop replacement

Could anybody provide me or help me in finding good materail on windows desktop replacement. I'm interesting in C++ source code or similar projects.

Here's an open source Shell http://emergedesktop.org/

Shell history tree that may have some http://desktopian.org/shelltree.html

And maybe a google or search at sourceforge.net for Window Shell Replacemnts.

Blackbox is what I use and it's really good (i'm using the xoblite package), now if we could get a full openbox port ...