Microsoft has just released version 6 of Skype for Windows and Mac and it comes with a whole host of new features, including Retina display support, multiple chat windows, Microsoft and Facebook Integration, and much more.

So what else is new? With Microsoft and Facebook account integration, you can sign up and sign-in to Skype much easier using your Microsoft or Facebook account — you don’t need to create a new Skype account. You can also IM contacts from Windows Live Messenger, Hotmail, and Outlook.com, all through Skype. Soon you’ll even be able to make audio or video calls to Windows Live Messenger using Skype for desktop.

Skype’s blog has a whole list of what’s new in Skype 6.0 and here’s a look at what it has to offer:

Open Chats in Multiple Windows

  • We hear your feedback! With this release we’ve added support to open chats in multiple windows.

Retina Display Support

  • We also added another feature you’ve asked for – support Retina display. Now you can take full advantage of improved usability and of higher resolution screens.

Skype localized to six more languages

  • We are excited to support our growing community around the world with new localized versions of Skype in Thai, Croatian, Slovenian, Serbian, Catalan and Slovak, bringing the total languages Skype supports to 38.

Visual user interface refresh

  • We have refreshed and flattened the Skype UI with a simpler and less cluttered look. We have updated the look of the instant messaging and SMS areas as well.

Removal of online user count

  • We have removed the online user counter at the bottom of your Skype Contacts list to unclutter the UI and make more space for your friends within the contacts list.

Display previously created profile pictures

  • When you change your profile picture, we will now show you all of your previous Skype profile pictures so you don’t have to look through old files if you want to use a previous image

Improved telemetry

  • We are constantly looking for ways to improve the quality of our product. To that end we are adding additional “opt-in” telemetry reports for users who choose this option: “Tools>> Options>>Advanced>>Tick “Help improve Skype…” The reports may contain your Skype ID and or Microsoft Account ID but we will not use it to identify or contact you.