games-fps/vavoom-textures:plutonia - Install 'The Plutonia Experiment' resources
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-puzzle/hex-a-hop:pango - Use sdl-pango instead of default sdl-ttf for font rendering
games-strategy/0ad:audio - Audio support
games-strategy/0ad:editor - Include Atlas scenario editor projects
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
+mail-client/mutt-kz:gpg - Enable support for app-crypt/gpgme
+mail-client/mutt-kz:notmuch - Enable support for net-mail/notmuch
+mail-client/mutt-kz:pop - Enable support for pop
+mail-client/mutt-kz:smime - Enable support for smime
+mail-client/mutt-kz:smtp - Enable support for smtp
+mail-client/mutt-kz:tokyocabinet - Enable tokyocabinet database backend for header caching
mail-filter/gross:ares - Enables dnsbl checking using c-ares library
mail-mta/citadel:pic - Build position-independent executables
mail-mta/citadel:postfix - Makes it possible to run citadel alongside Postfix. Mailwrapper replacement.