is like an IM client, except it's for files. It uses an advanced and cryptographically secure protocol that can transfer unlimited files of unlimited size directly between computers, even if one or both users is behind a firewall!
It can also recover from pauses, restarts, crashes, or even changes in external network address. This means that you can start a transfer at home, close your laptop, go to a coffee shop, and when you open your laptop and go online the transfer will simply continue.
The basic FilePhile client is free, and a Pro version is on the way. Runs natively on Mac, Windows, and Linux/Unix, meaning more...
Version 1.4 features a free automatic relay service that permits the approx. 5% of users whose routers/firewalls will not allow a direct connection to transfer files by bouncing off a FilePhile server. This doesn't impact security or privacy at all, since data is still encrypted by the sender and can be decrypted only by the receiver.
Mac OS X 10.4 or later, FilePhile account.
*Previously available here