6 Unbelievable Free Network Diagram Tools  

At some point, every administrator will need to diagram a network. For some, it's their primary duty -- and they tend to rely on powerful, expensive tools like Microsoft Visio. But for those who need to use a diagramming tool only occasionally, a cheaper solution is best. Luckily, there are several free apps that handle the task well.

Here are five tools that can help you diagram your network without breaking your budget. Some are Windows-only, while others are cross platform.

CADE was developed primarily as a CAD tool, but it also serves as a handy network diagramming tool. It's a 2D vector editor for Windows. Although it doesn't have all the bells and whistles of some costlier tools, it can handle the task of diagramming your network with ease.

Dia is an open source, GTK+ diagramming tool that has a shallow learning curve and can help you create basic network diagrams. Like CADE, Dia was inspired by Visio — but with a much more casual approach and feel. Dia loads and saves XML formatted documents that are gziped by default to save space. Dia is also available for Linux, Mac, and Windows.

Diagram Designer is another freeware tool that suffers (like Dia) from looking a bit on the outdated side. But Diagram Designer’s ease of use should certainly make up for the old-school feel of the application. DD features include customizable template objects, a spell checker, import/export (WMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, and PCX), a slide show viewer, a graph plotter, a calculator, MeeSoft Image Analyzer integration, and compressed file format.

Gliffy is the only Web-based tool on this list. It’s easy to use and it works on any platform. With the ability to drag and drop shapes from numerous object libraries, you can have your network diagram ready in no time. You can use Gliffy for free, but if you really want to get into creating some diagrams, you may want to pony up the $4.95/month fee for 200 diagrams, 200 MB of storage, public and private diagrams, and unlimited collaborators.

yEd is a Java-based tool that’s available for Windows and Linux. It has a great user interface and features diagram creation, auto-layout, data import (GraphML, Excel XLS, GEDCOM, GML, XML), and data export (PDF, SWF, JPG, GIF, BMP, and HTML image maps). The auto-layout feature is particularly cool. It uses a wide range of sophisticated layout algorithms to automatically arrange your diagrams, saving you time and effort.

Office Visio Professional 2007 is helping IT and business professionals worldwide visualize, analyze, and communicate complex information, systems, and processes. Extend Office Visio 2007 programmatically or integrate it with other applications to fit your industry-specific scenarios. Develop your own custom solutions and shapes, or use those from Visio Solution Providers. Embed and program the Visio drawing environment to include the power of Visio in any smart client application.

The all above tools are free for use, Use these tools and describe you network diagram and each network point, full feature and support on Windows and Mac OS.