Here is a list of all documented namespaces with brief descriptions:

Neditor
NAssets
NImporters
NTypes
NComponents
NBehaviors
NConverters
NCurveCanvas
NElements
NModals
NConverters
NEditors
NEngine
NGit
NLogger
NStartWindow
NVoxelEditor
NWorkspace
Ntoast
N_detail	Member-robber pattern used by the generated reflection code