The graph algorithms are found in the neo4j-graph-algo component, which is included in the standard Neo4j download.

For Maven users, the component has the coordinates org.neo4j:neo4j-graph-algo and should be used with the same version of org.neo4j:neo4j-kernel. Different versions of the graph-algo and kernel components are not compatible in the general case. Both components are included transitively by the org.neo4j:neo4j:pom artifact which makes it simple to keep the versions in sync.

The starting point to find and use graph algorithms is GraphAlgoFactory.