igraph

igraph is an open-source software library for complex network analysis and graph theory, supporting C, R, and Python. It offers tools for creating, manipulating, and visualizing large-scale graphs and networks, and is designed for academic researchers, data scientists, and engineers working in network analysis and mathematical modeling. igraph is known for its consistent and predictable API, advanced random graph generators, as well as efficient handling of large datasets with billions of vertices and edges.