ConceptDraw is a cost effective diagramming application alternative to Microsoft's Visio.
ConceptDraw NetDiagrammer is specifially designed to allow the creation of high quality diagrams and schematics for network and systems designers.
ConceptDraw NetDiagrammer is supplied with a large library of detailed network object shapes. Intelligent smart connectors can be used to join shapes together to build complex network diagrams for LAN and other networks.
Diagrams can be saved in a number of common file formats, making it easy to print and publish diagrams to the web, to Adobe Acrobat PDF documents and also to Microsoft PowerPoint presentations.