Class List
Here are the classes, structs, unions and interfaces with brief descriptions:
[detail level 12345]
 NAddonManager
 NAddonManagerGui
 NAppThe FreeCAD Aplication layer
 NArchComponentThe base class of all Arch objects
 NArchPanelThe Panel object and tools
 NArchSectionPlaneThe Section plane object and tools
 NArchSpaceThe Space object and tools
 NArchStructureThe Structure object and tools
 NArchVRMThe Arch Vector Rendering Module
 NAttacherAttacher.h, Attacher.cpp contain the functionality of deriving placement from a set of geometric subelements
 NAttacherGuiAttacherTexts.h, .cpp - files that contain user-friendly translatable names of attachment modes, as well as help texts, and the like
 NAttachmentEditor
 Nautomotive_design
 NBaseBasic structures used by other FreeCAD components
 NBaseTests
 NBOPTools
 NClipperLib
 NCommands
 Nconfig_control_design
 NData
 NDocument
 NDocumentObject
 NDraftGuiGUI elements and utilities of the Draft workbench
 NDraftSnapSnapping system used by Draft & Arch workbenches
 NDraftToolsGUI Commands of the Draft workbench
 NDraftTrackersCustom Pivy-based objects used by the Draft workbench
 NDraftUtils
 NDrawing
 NDrawingGui
 NexportDRAWEXE
 NFeaturePython
 NFem
 NFemCommands
 NFemGmshTools
 NFemGui
 NFemInputWriter
 NFemInputWriterCcx
 NFemInputWriterZ88
 NFemSelectionObserver
 NFemTools
 NFemToolsCcx
 NFemToolsZ88
 NFreeCADGuiInit
 NGCS
 Ngeoff_geometry
 NGuiThe FreeCAD Graphical interface layer
 Nifc2x3