Sometimes you need to create a diagram for your project proposal or your presentation, but you don’t have a commercial diagram builder software such as Visio or Smart Draw. Don’t worry, Gliffy could be your alternative to do this, since it is FREE and it is online. For free account type, you just can build 5 public diagram only, for unlimited use, you must registered as Gliffy Premium user, its about 5$ per month.
Gliffy is free online diagram (flow chart) builder, it can be used to create various diagram : flow charts,
network diagrams, floor plans, organizational structure charts, SWOT diagrams, technical diagrams, UML, and more …
It is the preview of Gliffy user interface :
And this is another preview of diagram result that created using Gliffy :