GORM
Hibernate
The original implementation of GORM, GORM for Hibernate provides all the goodness of GORM for SQL databases.
- Documentation - API - Source
GORM 8 - A powerful Groovy-based data access toolkit for the JVM
GORM is the data access toolkit used by Grails and provides a rich set of APIs for accessing relational and non-relational data including implementations for Hibernate (SQL), MongoDB, Neo4j, Cassandra and an in-memory ConcurrentHashMap for testing.
Neo4j
GORM for Neo4j is built on the native Neo4j Bolt driver.
- Documentation - API - Source
MongoDB
Built on the MongoDB Java Driver GORM for MongoDB includes features like Geospatial querying, Text search and Schemaless access etc.
- Documentation - API - Source
Cassandra
Built for managing massive amounts of data in the cloud. GORM for Cassandra lets you map your objects to Cassandra tables.
- Documentation - API - Source