Yahoo! Messenger 11.5.0.228

Instant Messaging - Instant message with one friend, or conference in a bunch

Chat Rooms

Photo Sharing

PC-to-PC Calls - Make a voice call to another Yahoo! Messenger user for free (microphone and speakers/headset required).

Phone Out (PC-to-Phone Calls) - Call friends on their regular or mobile phones from Messenger for as low as 1¢ a minute (Phone Out account required).

Phone In (Get a Phone Number for Messenger)

SMS (Text Messaging)

Webcam

IM Conferencing

IM with Friends on Other Networks 

File Transfer - Send files while you IM (2 GB limit).

IM Forwarding to Mobile - When you sign out of Messenger, have new IMs sent to your phone as text messages.

Contact Search Bar - Quickly find a contact to IM, call, SMS or more.

Yahoo! Search - Start a web search right from your Yahoo! Messenger window.

Yahoo! Address Book - View and edit your Yahoo! Address Book information for your contacts right from Messenger.

Stealth/Privacy Settings - Make yourself appear online to some friends, and offline to others.

Call Forwarding - Have incoming calls to Messenger forwarded to another phone number, even if you're signed out (Phone Out account required).

Message Archiving - Maintain a private archive of your IM conversations.

Tabbed IM Windows - Reduce desktop clutter by organizing multiple conversations into a single window.

Yahoo! Updates - Get real-time updates in Yahoo! Messenger about what your friends are posting online, reviewing and generally buzzing about

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