Sage of Code

I have been searching for an Open Source alternative to Visio for some time.  I found several alternatives.  The application that I have found most flexible and usable is Dia.

Dia supports several diagram types (e.g., flow chart, UML, etc.), as noted in the online help.  To view objects for each of these diagram types, select the ” ” in the In the floating window with objects and select ” ”

…and a list of all the diagram types will appear:

This is the coolest feature!