Java

libsignal-protocol-javasignalapp/libsignal-protocol-java

A Java implementation of the Signal Protocol for end-to-end encrypted messaging with forward secrecy and asynchronous support.

gs-collectionsgoldmansachs/gs-collections

A Java collections framework with rich APIs, optimized implementations, and additional container types like Bag and Multimap.

InQL Scannerdoyensec/inql

A Burp Suite extension for advanced GraphQL security testing, featuring vulnerability scanning, batch attacks, and schema analysis.

Applied Energistics 2AppliedEnergistics/Applied-Energistics-2

A Minecraft mod that adds advanced storage, automation, and energy management systems using matter and energy networks.

JLinejline/jline3

A Java library for handling console input with advanced line editing, history, and completion, similar to GNU Readline.

Datafakerdatafaker-net/datafaker

A modern Java/Kotlin/Groovy library for generating realistic fake data with extensive providers and format support.

jvm-profileruber-common/jvm-profiler

A Java Agent for distributed JVM profiling, collecting metrics and tracing methods for Hadoop/Spark applications.

Gaffergchq/Gaffer

A graph database framework for storing and querying large-scale graphs with rich properties and in-database aggregation.

Embulkembulk/embulk

A parallel bulk data loader that transfers data between various storages, databases, NoSQL, and cloud services via plugins.

EasyDeviceInfonisrulz/easydeviceinfo

An Android library to retrieve device information with a simple, modular API.

CQEnginenpgall/cqengine

A high-performance Java collection engine enabling SQL-like queries with indexes for microsecond latencies.

GenieNetflix/genie

A federated Big Data orchestration service that simplifies job execution across distributed clusters by abstracting infrastructure complexity.

SQLancersqlancer/sqlancer

Automated testing tool that finds logic and performance bugs in database management systems (DBMSs) through intelligent SQL generation and validation.

kairosdbkairosdb/kairosdb

A fast distributed scalable time series database built on top of Cassandra.

Tess4Jnguyenq/tess4j

A Java JNA wrapper for Tesseract OCR API, enabling OCR functionality in Java applications.

Bootboot-clj/boot

A Clojure build framework and ad-hoc script evaluator that provides a runtime environment for building projects from Clojure scripts.

jBPM (.7k)kiegroup/jbpm

An open-source Business Process Management (BPM) suite for automating business processes and decisions.

React Native Firebase Cloud Messagingevollu/react-native-fcm

A React Native module for Firebase Cloud Messaging (FCM) and local notifications, now deprecated in favor of react-native-firebase.

SoapUI (.6k)SmartBear/soapui

A free and open-source cross-platform functional testing solution for APIs and web services.

JPHPjphp-group/jphp

JPHP is a PHP compiler that runs on the Java Virtual Machine, enabling use of Java libraries and building desktop/Android apps.

react-native-contactsrt2zz/react-native-contacts

A React Native library for accessing and managing the device's native contacts with full CRUD operations.

sqlix-ream/sqli

A lightweight Java ORM and SQL query builder with a fluent API for QB, QB.X, and QrB operations.

perf-map-agentjrudolph/perf-map-agent

A Java agent that generates method mapping files for JIT-compiled code to enable profiling with Linux perf tools.

jmxtransjmxtrans/jmxtrans

A connector that collects JMX metrics from JVMs and outputs them to various monitoring and graphing systems.

Stagemonitorstagemonitor/stagemonitor

An open-source Java application performance monitoring agent with preconfigured dashboards for Elasticsearch, Graphite, and InfluxDB.

SectionedRecyclerViewAdapterluizgrp/SectionedRecyclerViewAdapter

An Android RecyclerView adapter that splits lists into sections with headers, footers, and individual state control.

MorphiaMorphiaOrg/morphia

A lightweight, type-safe object-document mapper for MongoDB in Java, built on the official MongoDB Java driver.

Joltbazaarvoice/jolt

A Java library for declarative JSON-to-JSON transformations using JSON-based specifications.

db-schedulerkagkarlsson/db-scheduler

A persistent, cluster-friendly task scheduler for Java applications using a single database table.

Apache Pekkoapache/incubator-pekko

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala with the Actor Model.

ViaVersionMylesIsCool/ViaVersion

A Minecraft server plugin that allows newer client versions to connect to older server versions, enabling cross-version compatibility.

Open Dotaodota/core

Open source Dota 2 data platform providing automated replay parsing and a public API for match analytics.

Spring Integration (.6k)spring-projects/spring-integration

Extends the Spring programming model to implement Enterprise Integration Patterns for messaging and external system integration.

closhdundalek/closh

A modern, Bash-like shell that uses Clojure syntax for command composition and data manipulation.

Siddhisiddhi-io/siddhi

A cloud-native streaming and complex event processing engine that executes Streaming SQL queries for real-time event processing.

XChartknowm/XChart

A lightweight Java library for plotting data with minimal setup and extensive customization options.