It provides Mac OS X users a way to control several Macs using a single mouse and keyboard. Its interface mimics the Monitors preferences panel, where shared hosts discovered using Bonjour appear and can be arranged around the monitors. The clipboard can be synchronized between all Macs.
From version pr4, teleport also encrypts network transfers, so that keystrokes can't be sniffed, and allows drag & drop of files and folders between Macs.
It's currently available in English, French, German, Italian, Spanish, Danish and Czech.