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 have a recommendation on a good library for this - either OSS or commercial? I am aware that Infragistics has one, as well as Divelement's SandDock and WPF-Dock from DevComponents, as well as ActiPro's Docking & MDI product. There is also one on CodeProject. Has anyone used any of these libraries? Was the experience good or bad? If you have experience with one of them, does it support multiple "docking sites"?
I've been using the ActiPro library for several months and it's done me well. It does support multiple docking sites. The support is outstanding and you get some other controls (date picker, etc) that are missing from WPF. To me, for $150 it's money well spent. It worked out of the box, no fuss.
We used to use Divelements for WinForm controls but we think Actipro has better support, so we switched for WPF.
Just my two cents.