Used to announce new releases and for other important messages.
Used as a general discussion and help forum.
Used for discussion of translations and related things.
Used for the development of the GNU Privacy Handbook.
Used to discuss the development of the GNU crypto library which will be used by a future GnuPG version and is also used by a couple of other projects.
Used to discuss the development of the GNU Privacy Assistant (a graphical frontend for GnuPG).