Cytoscape - Cytoscape Official Web Site
GraphThing - GraphThing is a tool that allows you to create, manipulate and study graphs.
Gephi - Gephi is an open-source software for visualizing and analyzing large networks graphs.
jsflap - A web-based NFA and DFA construction and testing tool.
ikolinks - Do everything with one platform. The #1 no code bio pages tool using AI.
Graphviz - Graphviz is open source graph visualization software. It has several main graph layout programs.