"Alliance is a private and secure environment to share files and communicate with people you know. It is simple, easy to use and free.
You can for example share photos and videos with family and friends. Another use is to share confidential data with your coworkers.
Alliance is open source and works on Windows, Mac OS X and Linux. The Alliance network is completely decentralized. Encryption is an important part of Alliance. Robust encryption (SSL) has been implemented and is available as an experimental option in Alliance. By default Alliance runs on a very simplistic encryption algorithm as this writing."