Java

JMeter Maven Pluginjmeter-maven-plugin/jmeter-maven-plugin

A Maven plugin that integrates Apache JMeter performance tests into your Maven build lifecycle.

mapbox-javamapbox/mapbox-java

Java SDK providing wrappers for Mapbox APIs including directions, geocoding, and other location services.

OpenDJOpenIdentityPlatform/OpenDJ

An open-source LDAPv3 directory server written in Java for scalable identity management and authentication.

stanford-core-nlplouismullie/stanford-core-nlp

Ruby bindings for the Stanford CoreNLP natural language processing toolkit, supporting English, French, and German.

geohashdavidmoten/geo

A Java library providing geohash encoding, decoding, and bounding box utilities for efficient location-based queries.

hikari-cptomekw/hikari-cp

A Clojure wrapper for HikariCP, providing a production-ready JDBC connection pool with zero-overhead performance.

LogCaptorHakky54/log-captor

A Java library for capturing log entries in unit and integration tests without mocking or custom extensions.

Password4jPassword4j/password4j

A Java cryptographic library for hashing and verifying passwords with Argon2, bcrypt, scrypt, PBKDF2, and Balloon Hashing.

ActivityStarterMarcinMoskala/ActivityStarter

An Android library that simplifies starting Activities, Fragments, Services, and BroadcastReceivers with arguments using annotations.

Bitronixbitronix/btm

A simple, complete Java Transaction API (JTA) 1.1 implementation for XA transaction management.

Permazenpermazen/permazen

A language-natural persistence layer for Java that treats the database as a sorted key/value store and implements everything else in Java.

react-native-gl-model-viewrastapasta/react-native-gl-model-view

A React Native component for displaying and animating textured Wavefront .OBJ 3D models at 60fps on iOS and Android.

ThreeTen-ExtraThreeTen/threeten-extra

A Java library providing additional date-time classes that complement the JDK 8 date-time API.

MobilityData's gtfs-validatorMobilityData/gtfs-validator

A cross-platform validator for GTFS Schedule (static) transit data files, ensuring compliance with the official specification.

jackson-modules-java8FasterXML/jackson-modules-java8

Jackson modules for Java 8 datatypes (Optionals, date/time) and parameter name detection.

consul-apiEcwid/consul-api

A comprehensive Java client library for interacting with the Consul HTTP API, supporting all endpoints and consistency modes.

high-scale-libboundary/high-scale-lib

A maintained fork of Cliff Click's high-scale-lib with bug fixes, improvements, and versioned Maven builds.

ConcurrentUnitjhalterman/concurrentunit

A zero-dependency Java toolkit for testing multi-threaded and asynchronous code with cross-thread assertions.

amazon-kinesis-producerawslabs/amazon-kinesis-producer

A Java library for building efficient and reliable producer applications for Amazon Kinesis Data Streams.

Android-Link-PreviewLeonardoCardoso/Android-Link-Preview

An Android library that generates link previews by extracting titles, descriptions, and images from URLs.

Imposter ()outofcoffee/imposter

A scriptable, multipurpose mock server for REST APIs, OpenAPI, SOAP, gRPC, Salesforce and HBase APIs.

Caffeinepercolate/caffeine

A collection of utility classes that help make Android development faster and safer.

BangClewoxihuannisja/Bangcle

Android app protector using second-generation hardening technology to load encrypted dex files from memory dynamically.

react-native-ssl-pinningMaxToyberman/react-native-ssl-pinning

A React Native library for SSL pinning and cookie handling using OkHttp3 on Android and AFNetworking on iOS.

Indigoepam/Indigo

A universal cheminformatics toolkit with database search engines, a core library, and utilities for molecular processing.

Buttercup Mobilebuttercup/buttercup-mobile

React Native mobile application for the Buttercup password manager, offering secure on-device vault management.

JSCovertntim96/JSCover

A JavaScript code coverage tool that measures line, branch, and function coverage across browsers.

R5: Rapid Realistic Routing on Real-world and Reimagined networksconveyal/r5

A routing engine for multimodal transportation networks with realistic travel-time calculations, designed for accessibility analysis and scenario planning.

bemiBemiHQ/bemi

Automatic and reliable PostgreSQL data change tracking using Write-Ahead Log and Change Data Capture.

WSO2 Enterprise Integrator ()wso2/product-ei

An open-source hybrid integration platform for connecting applications, data, and systems with enterprise-grade features.

image-comparisonromankh3/image-comparison

A Java library for comparing two images of the same size, visually highlighting differences with configurable rectangles, ideal for automated QA testing.

TimelyNationalSecurityAgency/timely

A secure time series database backed by Apache Accumulo with Grafana integration for data visualization.

graphql-java-annotationsEnigmatis/graphql-java-annotations

An annotations-based syntax library for defining GraphQL schemas in Java, reducing verbosity compared to plain graphql-java.

jOOQjklingsporn/vertx-jooq

A jOOQ code generator that creates asynchronous, Vert.x-compatible DAOs and POJOs for reactive database operations.

Modernizergaul/modernizer-maven-plugin

A Maven plugin that detects uses of legacy Java APIs in your codebase, promoting modern, performant, and idiomatic alternatives.

SimpleNoSQLJearil/SimpleNoSQL

A lightweight NoSQL document store for Android using key/value pairs with basic querying capabilities.