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OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
Elassandra = Elasticsearch + Apache Cassandra
Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
Writing SQL using Java syntax
SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.
FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand.
Fast and Easy mapping from database and csv to POJO. A java micro ORM, lightweight alternative to iBatis and Hibernate. Fast Csv Parser and Csv Mapper
Java Object-Graph Mapping Library for Neo4j
OME (Open Microscopy Environment) develops open-source software and data format standards for the storage and manipulation of biological light microscopy data. A joint project between universities, research establishments and industry in Europe and the USA, OME has over 20 active researchers with strong links to the microscopy community. Funded by private and public research grants, OME has been a major force on the international microscopy stage since 2000.
An ORM / OGM for the TinkerPop graph stack.
TinkerPop3 Graph Structure Implementation for OrientDB
Externalized Properties is powerful configuration library which supports resolution of properties from external sources such as files, databases, git repositories, and any custom sources
A JMeter plug-in that enables you to send test results to a Kafka server
Ductile DB is a graph database based on Hadoop/HBase which provides a vast set of features.
Vert.X Marklogic client
Vertx-MongoDB-Effect enables interaction with MongoDB in a purely functional and reactive style, seamlessly integrating with Vertx-effect. This library requires familiarity with Vertx-effect, as both frameworks share a foundational reliance on immutability and persistent data structures provided by json-values.