yEd Graph Editor Replacement For Visio

yEd by yWorks is a very nice graphical editor which can be considered a very perfect replacement for Visio. The tool is very simple and provide most of the functionalities of Microsoft Visio. It doesn't provide a very large collection of graph types like in Visio but at least it provides the most used and popular ones. You can create UML diagrams, flowcharts, block diagrams, networks and more. You can have glassy figures, rounded corners, curves, edges and shadows. Although, it's a Java tool, I didn't find it slow or heavy in loading. It's a very powerful graph editor tool and it really worth a try: Download yEd Graph Editior