Addresses is a GNUstep address book that consists of a full-featured address book manager application, a source-code compatible replacement for Apple's AddressBook.framework (for accessing and manipulating address data programmatically), a framework of view/editor classes that make it easy to use Addresses from your own programs, and a number of tools. It is easy to use by both users and programmers and can store almost all imaginable data, including multiple phone numbers, emails, and addresses, photos, AIM/Jabber/ICQ/Yahoo IM details, and notes. It supports drag-and-drop and integrates well with GNUMail.
CouchPotato is a media center application. It can play movies (in any format QuickTime can play) and it works with all infrared remote controls supported by the IRTrans universal IR receiver. CouchPotato is extendable by plugins. Plugin classes include applications (DVD player, music player, etc.), skins, and more.