- Make and take calls from your desktop or mark yourself as unavailable
- Choose your look and feel from seven different skins
- Has built-in integration with your Mac's Address Book
- Includes two-line calling features, including call waiting and three-way calling
- Forwards your Whistle calls to any phone number via our Follow Me service
- Utilizes Apple's Bonjour technology to automatically discover and call Whistle users on your WiFi more...
- Gatekeeper v2 code signature
- OS X 10.6.6 or later