I know what you thought, another illegal file sharing program. Alliance, allows you to create your own p2p network so you can add your friends, and share files and programs. May they be legal or illegal. Alliance website quotes the following:

“Alliance is a private and secure place to share files and communicate with people you know. It is easy to use and free.

Technically Alliance takes the best parts of BitTorrent (advanced multi-source downloading), DirectConnect (community) and WASTE (security).

With Alliance users create their own networks. You can either start a new network or get invited into an existing network by another Alliance user.” – www.alliancep2p.com

Give it a shot and let us know what you think.