"Graphviz is open source graph visualization software" that has been in constant development since 1988. Graph visualizations provide an avenue for representing information as abstract diagrams or networks. While originally designed for bioinformatics and software engineering, Graphviz is flexible in structure and is highly applicable to humanities work. Graphviz functions by transforming simple text language into useful diagrams. The user is able to customize the Graphviz graphics by altering the colour, fonts, nodes, layouts, hyperlinks, and shapes to create specialized diagrams specifically suited to the project's needs.