ConceptDraw NetDiagrammer Description:

ConceptDraw NetDiagrammer is a cross-platform application for professional computer network diagramming, LAN scanning and visualization, preparation of network documentation, office/building/home network planning. The software is intended for network administrators, IT directors, network designers and engineers, and for everyone who finds detailed network documentation, diagramming and schematics critical. The software includes large collections of task-specific shapes of network objects as well as templates, samples, and easy-to-use wizards. ConceptDraw NetDiagrammer allows you to not only draw professional network and system diagrams and schematics but also all types of UML diagrams, floor plans and office layout drawings, flowcharts and dataflow diagrams, workflow and others.
Key features
Special libraries of highly detailed shapes
Automatic LAN Scanner and diagrammer
Cable Length Estimator
IP subnet mask calculator
Intelligent smart-connectors to connect components.
Multiple layers to separate different areas of visibility.
Export to graphic formats, PDF, Power Point, Flash, and HTML with hyperlinks.
Multi-page documents with hyperlinks.
Custom properties for storing detailed information on the network equipment.
Rich text capabilities to annotate your diagrams and different backgrounds.
Built-in ConceptDraw Basic scripting language for custom integration of your diagrams with any data source.
Works both on Win and MAC OS