This website is allows you to pick any region of the world and print its high points in artistic, joyful manner.

This visualization of related subreddits helps you find related subreddits

This website builds a graph from Google's auto suggestions

This website shows a map of GitHub. Each dot is a project. Two dots within the same cluster are usually close to each other if multiple users frequently gave starts to both projects

Code galaxies visualization allows you to explore huge graphs of software package managers (npm, go, ruby gems, composer, etc.)