What is Machsend?
Machsend is a site that lets you transfer files for free, without any limitations.
How does it work?
Machsend uses a Yahoo! plugin, called BrowserPlus to do its magic. The transfers are peer to peer - straight between the two clients and aren't relayed or proxied.
Technical details?
Machsend traverses firewalls with a TCP form of STUN (STUNT) combined with a bit of SYN packet manipulation. There's a few good papers on the subject here and here.
It's not working for me
Sorry, Machsend doesn't work with every firewall, only about 80%. We're working on a fallback - but I'm afraid you're out of luck at the moment.
Is my data safe?
Yes, we don't receive any of the data, or even the file names. It's totally private.
Who made this?
A Ruby developer called Alex MacCaw. You can find his blog here.