MicroStream is a Java-native object graph persistence engine for storing any complex Java object graph or any single subgraph and restoring it in RAM at any time by using a fundamentally new serialization concept designed from scratch. With MicroStream, not only the entire object graph, but also partial subgraphs, or only single objects can be restored in RAM on demand. Beyond serialization, MicroStream is ACID transaction safe, can handle your class changes, provides a garbage collector for the storage, multi-threaded IO, and connectors for various data storages.


Microstream - High Performance Java-Native Object Graph Persistence


 Package slowpoke is a simple key/value store written using Go's standard library only. Keys are stored in memory (with persistence), values stored on disk. Keys are stored in memory with persistence to disk. Values stored on disk only.

Slowpoke - Low-level key/value store in pure Go

A fast, high availability, fully Redis compatible store.


qdb - A fast, high availability, fully Redis compatible store.

The Marten library provides .NET developers with the ability to use the proven PostgreSQL database engine and its fantastic JSON support as a fully fledged document database. The Marten team believes that a document database has far reaching benefits for developer productivity over relational databases with or without an ORM tool.Marten also provides .NET developers with an ACID-compliant event store with user-defined projections against event streams.

Marten - Postgresql as a Document Database and Event Store for .Net Applications

Apache OpenJPA is a Java persistence project at The Apache Software Foundation that can be used as a stand-alone POJO persistence layer or integrated into any Java EE compliant container and many other lightweight frameworks, such as Tomcat and Spring. 

Apache OpenJPA - Java Persistence API Implementation

Norm is a simple way to access a JDBC database, usually in one line of code. It purges your code of the complex mess that is Hibernate, JPA, and ORM. It is an extremely lightweight layer over JDBC. It gets rid of large amounts of boilerplate JDBC code. 

norm - Not Object-Relational Mapping

Object Relational Mapping Lite (ORM Lite) provides some simple, lightweight functionality for persisting Java objects to SQL databases while avoiding the complexity and overhead of more standard ORM packages. 

OrmLite - A lightweight ORM for Java

MongoDB object modeling designed to work in an asynchronous environment. It provides a straight-forward, schema-based solution to modeling your application data and includes built-in type casting, validation, query building, business logic hooks and more, out of the box.

Mongoose - Elegant MongoDB object modeling for Node.js

Apache Geode  is distributed, in-memory database for scale-out applications. All data is stored in-memory for low latency. Performance scales linearly as nodes are added. Data is distributed automatically between nodes to optimize performance. Clusters fail-over to other nodes in case of failures, and rebalance remaining resources. Geode servers can be configured to talk memcached protocol. 

Apache Geode - Distributed, In-memory Database for Scale-Out Applications

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