Graphviz (Graph Visualization Software) is a package of open-source tools initiated by AT&T Labs Research for drawing graphs specified in DOT language scripts. Developed by AT&T Research Labs and Contributors
License: Open Source
Graphviz excels in graph visualization with its powerful DOT language and versatility in graphing capabilities, while UMLet stands out for its user-friendly interface specifically designed for creating UML diagrams quickly. Both tools have their strengths and weaknesses, making them suitable for different use cases in diagram creation and visualization.