Graphviz

Graphviz provides robust graph drawing capabilities tailored for engineering applications. It visualizes structural information—such as network connections, state transitions, or component hierarchies—as clean, scalable diagrams. The software parses plain-text graph definitions and applies layout engines to produce intuitive visuals. This is invaluable for documenting systems, analyzing dependencies, or presenting workflows. With support for scripting and APIs, it fits into automated pipelines. As open source software, it offers transparency and community-driven enhancements, making it a trusted tool for technical diagramming.