The user interface is the QGIS interface with additional WNT specific menu icons.

WNT Tools:
 
 Edit Asset
 Edit Asset
 Manage 
Network
  Manage 
Network
 Build/Update 
Topology
 Build/Update 
Topology
 Reverse 
Flow 
Direction
 Reverse 
Flow 
Direction
 Settings
 Settings
 Help
 Help
Important QGIS Tools:
 Toggle 
Editing
 Toggle 
Editing
 Add Point 
Feature
  Add Point 
Feature
 Add Line 
Feature
 Add Line 
Feature
 Add Polygon 
Feature
 Add Polygon 
Feature
 Move 
Feature
 Move 
Feature
 Node Tool
 Node Tool
 Delete Selected
 Delete Selected
 Select 
Feature
 Select 
Feature
 Deselect 
Feature
 Deselect 
Feature