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.
The ipoque PRX traffic manager effectively detects and controls all major peer-to-peer (P2P) filesharing, instant messaging (IM), and Voice over IP (VoIP) protocols. Bandwidth and volume limits can be assigned to network links, subnets, individual users, and user groups. Detailed usage statistics are provided and can be exported for post-processing. This community edition is a fully functional version with a bandwidth limit of 2 Mbit/s.
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.
MUTE File Sharing is an anonymous, decentralized search-and-download file sharing system. Several people have described MUTE as the "third generation file sharing network" (From Napster to Gnutella to MUTE, with each generation getting less centralized and more anonymous). MUTE uses algorithms inspired by ant behavior to route all messages, include file transfers, through a mesh network of neighbor connections.
Akeni Instant Messaging Server Pro is a client/server instant messaging platform that allows companies to host their own secured private IM system. The client has an user interface similar to AIM, ICQ, or MSN Messenger. It supports all the standard IM features such as chat, group conference, presence management, file transfer, offline messages, and emergency alert/notification. Extra features include contact management and optional tabbed chat sessions. The server has advanced administration tools for managing user accounts, client-side logging capabilities, and peer-to-peer file transfers. It can be set up on a private network without connecting to the Internet, and can easily be set up for use inside and outside of the company firewall.