Visual graph editor?

Seeking help for an ergonomic visual graph editor for the project AIMIG, "Assisted intelligence in Medicine using Interactive Graph", http://www.aimig.org/ , among others using the mouse for the creation of a new relationship.
Something looking like https://neo4j.com/labs/arrows/, but with the possibility to update immediately a regular Neo4j database.
Visual clues of attributes like https://visjs.github.io/vis-network/examples/,
Open source and Open Data.