I am currently close to completing a Winforms application buit using DevExpress.
It is an electronic design program that users can drawn electronic schematics, simulate the circuit and produce a final PCB and view it in 3D.
It incorporates extensive 2D and 3 graphics and is written in C#, C++/CLI and C++.
you can download it from http://www.kov.com/Download/Dex.aspx
It uses Ribbon menus and classic menus (users can switch). All dialogs are modeless and dockable. There are even some wizards there. Settings are all persisted.
The schematic libraries it uses are downloaded using WCF.
I have written all the sotware and am prepared to license version with source code. It includes 120K lines of C# code and 100K lines of C++ code. you can email me at ik10@kov.com
Regards
Ilija Kovacevic