neo4j - Meet Neo4j: The graph database platform powering today's mission-critical enterprise applications, including artificial intelligence, fraud detection and recommendations.
Workday - Workday is an on‑demand financial management and human capital management software solution.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Kronos Workforce Ready - The Kronos Workforce Ready® suite combines the power of workforce management and human capital management in one unified cloud platform.
OrientDB - OrientDB - The World's First Distributed Multi-Model NoSQL Database with a Graph Database Engine.
UltiPro - UltiPro is another HR application available to use on multiple platforms such as Android and iOS etc.