QuestDB is a high performance, open-source, time-series database
- time-series
- low-latency
- database
- sql
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LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
- java
- hazelcast
- in-memory
- big-data
:elephant: Elasticsearch real-time search and analytics natively integrated with Hadoop
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
Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)
- backend
- api-server
- json-api
- baas
Distributed database specialized in exporting key/value data from Hadoop
A simple NoSQL client for Android. Meant as a document store using key/value pairs and some rudimentary querying. Useful for avoiding the hassle of SQL code.
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
JMeter plugin that lets you send sample results to an ElasticSearch engine to enable live monitoring of load tests.
- jmeter
- plugin
- jmeter-plugin
- elasticsearch