Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI, with MCP support.
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Apache Doris is a real-time analytics and hybrid search database for AI agents.
- olap
- database
- hudi
- iceberg
Apache ZooKeeper
- zookeeper
- database
- hacktoberfest
- java
Flyway by Redgate • Database Migrations Made Easy.
- flyway
- java
- database-migrations
- java-library
A library for debugging android databases and shared preferences - Make Debugging Great Again
Main Liquibase Source
- java
- liquibase
- database-migrations
- java-library
Apache Ignite
- distributed-sql-database
- iot
- osgi
- network-client
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
Apache Linkis builds a computation middleware layer to facilitate connection, governance and orchestration between the upper applications and the underlying data engines.
Free database schema discovery and comprehension tool
- schemacrawler
- jdbc
- database-diagrams
- schema
Elassandra = Elasticsearch + Apache Cassandra
- cassandra
- elasticsearch
- search
- completion
Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
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.
- xquery
- java
- temporal-data
- storage
Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.
- java
- elasticsearch
- full-text-search
- lucene
NoSQL embedded document store for Java
- nosql
- embedded-database
- documentdb
- android
Provide support to increase developer productivity in Java when using Neo4j. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
An open-source columnar data format designed for fast & realtime analytic with big data.
- indexr
- columnar-storage
- olap
- datawarehouse
Accumulo backed time series database
- accumulo
- series-database
- time-series
- hacktoberfest
A Java DSL (Builder) for the Cypher Query Language
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.
- omero
- java
- python
- server
Fast and storage-efficient spatial database engine for OpenStreetMap data
Use the MongoDB query language to query your relational database, typically from frontend.
- spring-data-jpa
- spring-boot
- jpa
- hibernate
Efficient, asynchronous batching and caching in clustered environments, port of Facebook DataLoader
- facebook-dataloader
- vertx-dataloader
- graphql
- java-8
TinkerPop 3 implementation on Elasticsearch backend