I like Anchors too although it already existed in a framework like Codemine. About the dockable forms, I found them great to create add-ins for the IDE but not that great for applications because I think it confuse the average user. Even for "power users" it's not that easy to dock the form where you want with the mouse.

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>Dockable forms and anchor properties. For me these two offer another step forward in being able to (more easily) create even more professional UI for my users.