TorBar
help protect net privacy from your menu bar
Source
Download 0.5.3 for OSX
Tor is free software and an open network that protects user's internet use against traffic analysis by bouncing communications around a distributed network of relays run by volunteers all around the world.

TorBar makes contributing to the Tor network easy. It adds a menu bar item that allows you to run a Tor relay node (not an exit node) that uses the minimum amount of bandwidth (50kbps up/down) at the click of a button. It remembers and will only run the relay on networks you've specifically enabled it to run on.

The TorBar.0.5.3.zip SHA256 digest is 996bd9ce9eb7d73629f3526b1bff1449864edfac9f92678300d8ee93c9f41215.