Downloading GraphVizio 1.1.4 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The most popular version of the software is 1.0. GraphVizio is included in Photo & Graphics Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of the free software is GraphVizio.
From the developer:
GraphVizio is an add-on for Microsoft Visio which allows you to layout Visio diagrams using the renowned Graphviz algorithms developed by AT&T research laboratories.
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These algorithms provide support for hierarchical, relational, clustered, circular and concentric styles. GraphVizio allows complete customisable control of the shapes, connectors and connection points, all from the standard Visio interface.
You may want to check out more software, such as TerraClient or WorldBuilder Pro, which might be related to GraphVizio.