Skype 5.5.0.124

Additionally it doesn't just work on Windows. Skype is also for Mac OS X, Linux and PDAs using Pocket PC, with a native look and feel for each platform. Talking, sending instant messages or even file transfers work between different platforms like a charm. 

1. Skype calling - Skype has all the features of an ordinary phone so it's even easier to manage your calls.
2. Video calling - see who you are talking to at the same time as speaking to them.
3. Add Skype and SkypeOut contacts - Add contacts who use Skype and those who use ordinary phones so you can call more people.
4. Organising groups - group contacts under certain names and share them with your contacts so they can talk to them too.
5. Basic chat and emoticons - when it's not convenient to call, chat or Instant Message (IM) your contacts.
6. Group chat - for when it's easier to chat or Instant Message (IM) all your friends at once.
7. Profile settings - change how you appear to the world and let people know a bit about you.
8. Conference calling - talk to more than one friend at a time.
9. Import contacts - search your address book to find friends and family that already have a Skype name and start calling them for free.
10. View Outlook contacts - view and call your Microsoft Outlook® contacts quickly and directly from your Skype contact list.
11. Quickfilter and Speed-Dial - find Skype contacts, recent chats and SkypeOut contacts quickly and easily, then enter their Skype name to call them back quickly.

• PC running Windows XP, Vista or 7, both 32- and 64-bit operating systems.
• Internet connection – broadband is best (GPRS is not supported for voice calls).
• Speakers and microphone – built-in or separate.
• For voice calls recommend broadband connection with 100 kbps down / 100 kbps up.
• For group video calling everyone on the call needs Skype 5.0 for Windows or Mac or higher plus webcams, and at least one person needs a group video calling subscription.  For best quality  they recommend you use a high-speed broadband connection of 4Mbps down / 512kbps up and a computer with a Core 2 Duo 1.8 GHz processor. As a minimum you’ll need a high-speed broad connection of 512kbps down / 128kbps up and a computer with a 1 GHz processor.