The user interface is the QGIS interface with additional WNT specific menu icons.
WNT Tools:
Edit Asset
Manage
Network
Build/Update
Topology
Reverse
Flow
Direction
Settings
Help
Important QGIS Tools:
Toggle
Editing
Add Point
Feature
Add Line
Feature
Add Polygon
Feature
Move
Feature
Node Tool
Delete Selected
Select
Feature
Deselect
Feature