Source: PC Magazine - June 2007
http://www.pcmag.com/article2/0,1759,2129801,00.asp

By Cade Metz and Jamie Bsales

So, you're tired of sending large files over e-mail—or at least trying to send large files over e-mail—and you don't like the browser-is-everything interface you get with AllPeers. Check out Tubes. This free download creates secure peer-to-peer connections, or "tubes," between your machine and the PCs used by your friends, family, and colleagues. You can send large files—including music and video—with a simple drag and drop.

http://www.tubesnow.com/