ALLIANCE p2p Messenger - without server - enxrpt
Alliance

Alliance is a private and secure environment to share files and communicate with people you know like in an Instant Messenger. It is decentral p2p-Buddylist without any server.

It's free. It's easy:

1. Download and run Alliance
2. Invite your coworkers or friends
3. Share files and communicate with them!

Alliance is a firend-to-friend network. It is written in Java 5.0 using Swing and asynchronous IO (java.nio package). The current implementation uses TCP/IP.

Alliance has file-swarming capabilities like BitTorrent. Unlike BitTorrent it has extensive build-in search, is completely decentralized and designed to be secure.

Alliance uses tiger hashes to identify files, maybe soon ed2k links as well.
All files that a user shares are automatically hashed and indexed in the background.

All of the above (and much more) is already implemented and has been proven to work well in a real-life environment.

Encryption is a vital part of Alliance: It will be in the next release – v0.9. Encryption will probably be implemented using the SSL package in Java 5.0 (SSLEngine class).

The user interface is designed with ease-of-use in mind. The goal for the UI is to be extremely simple and concise – everyone that can use Windows XP should be able to use Alliance.

http://www.alliancep2p.com