SaluSafe is an encrypted email, chat, and file storage and sharing system. Your email and files are highly encrypted end-to-end, and cannot be intercepted by any third party. It was built from the ground up for security via strong cryptography, and is not just another security wrapper on top of an existing email solution.
KDX is a powerful cross-platform BBS-style encrypted Internet communications system that provides messaging, news, file and folder transfer, voice chat (Internet Telephone), text chat, remote access, trackers, and more. It uses strong encryption to protect communications for security and privacy. It is useful for groups that need to collaborate on a project via the Internet. It is also very useful for remote administration of a computer. It uses a client/server architecture.
WASTE is a mesh-based workgroup tool that allows for encrypted, private communication between distant parties on the Internet, independent of local network organization. It is RSA secured, and has been heralded as the most secure P2P connection protocol currently in development. WASTE functions as a both a server and a client under *nix, Mac OS X, and Windows, as well as a server only mode under *nix and Windows.
Whisper IM is a secure IM client that provides end-to-end encryption over a XMPP/Jabber network. The encryption system (The Whisper Protocol) is designed for instant messaging, and is IM protocol and platform neutral. It supports all standard instant messaging features, such as messages, one to one chat, and online presence. The user interface is clean and easy to use. It also features multi-user chat (JEP45), context sensitive help, a service discovery tool (JEP30), and internationalization support.