• Docs 'n' help 'n' stuff: dragablz.net
• NuGet details here: http://www.nuget.org/packages/Dragablz/
• You can criticise the developer here: @James_Willock
  • No, seriously, please get involved and give me a ping with any questions/requests.

XAML as simple as this will give you a tab the tears out (using the basic theme).

<dragablz:TabablzControl Margin="8">
    <dragablz:TabablzControl.InterTabController>
        <dragablz:InterTabController />
    </dragablz:TabablzControl.InterTabController>
    <TabItem Header="Tab No. 1" IsSelected="True">
        <TextBlock>Hello World</TextBlock>
    </TabItem>
    <TabItem Header="Tab No. 2">
        <TextBlock>We Have Tearable Tabs!</TextBlock>
    </TabItem>
</dragablz:TabablzControl>

• You will have to restore NuGet packages
• I've seen Visual Studio get confused with both the .net 4.0 and 4.5 projects. If you see this compile Dragablz.net4*, and then DragablzDemo.net4* by right clicking on the project in the solution explorer. I'll try and improve this at some point...
• Are you using MahApps? If so then check this demo project showing Dragablz and MahApps working together.

• Drag and tear tabs
• User friendly docking
• Floating tool windows
• MDI
• Supports MVVM
• IE style transparent Windows
• Chrome style trapzoid tabs
• Custom (and optional) Window which supports transparency, resizing, snapping, full Window content.
• Miminal XAML required, but hooks provided for advanced control from client code
• Single light weight assembly targeting .net 4.* frameworks, no additional dependencies

• Layout persistance and restore
• Extra themes

Docking:

MDI:

________                            ___.   .__          
\______ \____________     _________ \_ |__ |  | ________
 |    |  \_  __ \__  \   / ___\__  \ | __ \|  | \___   /
 |    `   \  | \// __ \_/ /_/  > __ \| \_\ \  |__/    / 
/_______  /__|  (____  /\___  (____  /___  /____/_____ \
        \/           \//_____/     \/    \/           \/