Yahoo! Messenger is a free instant messaging service that you can use to communicate with other people who also use Yahoo! Messenger.
What's new in Yahoo! Messenger 7.0.0.242:
- Free worldwide calls
- Drag-and-drop photos
- Drag-and-drop file transfer
- Custom ring tones
- Support for USB headsets
- Indicators for new Yahoo! Mail, new voicemail, and updated Yahoo! 360° content
News source: Yahoo! Messenger