Cosmograph by Nikita Rokotyan
Cosmograph is a novel (and fastest) network graph visualization tool which can draw large networks consisting of up to 1 million nodes and several million edges in real-time. Even on a laptop.
It's something that was not possible before: other graph visualization tools and techniques usually start being slow when the number of nodes exceeds one hundred thousand.
It became possible thanks to our newly designed force graph simulation and rendering algorithm that runs purely on GPU. It's based on WebGL and it works in the browser!
Cosmograph is free to use and the algorithm behind it is open source and available on GitHub.