neo4j - Meet Neo4j: The graph database platform powering today's mission-critical enterprise applications, including artificial intelligence, fraud detection and recommendations.

Laserfiche - Laserfiche offers powerful document management software solutions that are easy to implement and easy to use.

ArangoDB - A distributed open-source database with a flexible data model for documents, graphs, and key-values.

DocuWare - DocuWare is a next-gen document management system that is specially designed for transferring paper-based and digital assets into collective resources.

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

IBM FileNet - Enterprise Content Management platform for large businesses