What is the shortest path between coffee and astronomy? wikiGraph allows you to find and explore paths between any two pages on Wikipedia.
Data are stored in a graph database (Neo4j) and paths are displayed with a force-directed layout as a scalable vector graphic (D3.js). The challenge was scaling the project from a small subgraph (100k pages) to the full dataset (11m pages) while keeping the query responsive (1 second average).
Project links: Github