graphviz viewer

Graphviz (short for Graph Visualization Software) is a package of open-source tools for drawing graphs (as in nodes and edges, not as in barcharts) specified in DOT language scripts having the file name extension "gv".
View, edit and save your Graphviz files (.gv) withthis lightweight app!

Features:
Edit and preview Graphviz files in real time.
Save Graphviz files as .svg, .png or .gv.
Built-in some Graphviz examples.
As a "Open With" option for .gv and .txt files.