dev-libs/libcgroup:tools - Enables build tools
dev-libs/liblightscribe:multilib - Installs the lib into the right dir on amd64
dev-libs/libplayer:vlc - Enable VLC media player support
+dev-libs/libref_array:trace - Enable low level tracing
dev-libs/libwiimote:force - Enable force feedback
dev-libs/libwiimote:tilt - Enable tilt
dev-python/cvxopt:glpk - Enable support for the linear programming solver GLPK
games-fps/vavoom-textures:tnt - Install 'TNT: Evilution' resources
games-misc/fretsonfire:guitarhero - Enable Guitar Hero song importer
games-misc/fretsonfire:psyco - Enable psyco python accelerator
+games-strategy/moo2:lordbrazen - Installs unofficial patch from lordbrazen.blogspot.com
+games-strategy/moo2:nocd - Install all files required to run the application without a CD mounted
games-util/bsp:dmalloc - Enable debugging with the dmalloc library
gnome-extra/evolution-rss:webkit - Build using the webkit renderer
gnome-extra/gnome-globalmenu:xfce - Build the Xfce panel applet.