cyNeo4j
A Cytoscape app to connect to a Neo4j database and execute extensions of the Neo4j database.
Find the app in the Cytoscape app store (http://apps.cytoscape.org/apps/cyneo4j) and on Github (https://github.com/gsummer/cyNeo4j). For a tutorial and installation guide for the server side component checkout https://cyneo4j.wordpress.com/ !
Icons from: http://openclipart.org/detail/7983/red-+-green-ok-not-ok-icons-by-tzeeniewheenie