Recommendations on a WPF Docking Library

Question

We are implementing an application that needs dockable windows, similar to Visual Studio 2005/2008, but with multiple \"docking sites\", unlike VS\'s single one. Does anyone

Answer 1

Don't forget AvalonDock on GitHub (part of WPF Toolkit). I've seen it mentioned in other places.

Initially I was going to use the ActiPro library (mostly because I am already using their ribbon), but I might give AvalonDock a chance since it is open source.

Anybody have any feedback/comments on AvalonDock?