Java

MIT Information Extraction Toolkitmit-nlp/MITIE

A free, state-of-the-art library and toolkit for named entity extraction and binary relation detection from text.

Android beacon library based on AltBeacon.AltBeacon/android-beacon-library

An Android library for detecting and ranging Bluetooth Low Energy (BLE) beacons with support for custom beacon formats.

binnavigoogle/binnavi

A binary analysis IDE for inspecting, navigating, editing, and annotating control flow graphs and call graphs of disassembled code.

iceNetflix/ice

A cloud cost and usage analysis tool for AWS that provides detailed billing insights, reservation management, and application group reporting.

jOORjOOQ/jOOR

A fluent API for Java reflection that simplifies accessing and manipulating class structures at runtime.

elasticsearch-jdbcjprante/elasticsearch-jdbc

A Java-based tool for importing tabular data from JDBC sources into Elasticsearch for indexing.

Cucumbercucumber/cucumber-jvm

A Java implementation of Cucumber for writing automated tests in plain language that anyone on your team can read.

Flowsquare/flow

A library for managing Android Activity UI states, navigation, and history with lifecycle-aware resource management.

JGraphTjgrapht/jgrapht

A free Java library providing mathematical graph-theory objects and algorithms.

OpenRocketopenrocket/openrocket

A free, fully featured model rocket simulator for designing and simulating rockets before building and flying them.

java-string-similaritytdebatty/java-string-similarity

A Java library implementing various string similarity and distance algorithms like Levenshtein, Jaro-Winkler, and n-gram methods.

bucket4jvladimir-bukhtoyarov/bucket4j

A Java rate-limiting library based on the token-bucket algorithm, offering high precision and support for both local and distributed scenarios.

manifold-graphqlmanifold-systems/manifold

A Java compiler plugin that adds metaprogramming, language enhancements, and type-safe data integration to boost developer productivity.

Erupterupts/erupt

An annotation-driven low-code data platform for building admin backends and AI applications with zero frontend code.

unirest-javaKong/unirest-java

A simplified, lightweight HTTP client library for Java that makes REST API calls easier.

MaterialIntroScreenTangoAgency/material-intro-screen

An Android library for creating beautiful, customizable Material Design intro screens with permission handling and parallax effects.

WebDriverManagerbonigarcia/webdrivermanager

Automates driver management for Selenium WebDriver in Java, handling download, setup, and browser instantiation.

voldemortvoldemort/voldemort

A distributed key-value storage system designed for horizontal scalability, automatic replication, and fault tolerance.

mongo-java-drivermongodb/mongo-java-driver

Official MongoDB drivers for Java, Kotlin, and Scala applications to connect and interact with MongoDB databases.

driver-kotlin-coroutinemongodb/mongo-java-driver

Official MongoDB drivers for Java, Kotlin, and Scala applications to interact with MongoDB databases.

commonmark-javaatlassian/commonmark-java

A Java library for parsing and rendering Markdown text according to the CommonMark specification with extensible features.

j2v8eclipsesource/j2v8

High-performance Java bindings for the V8 JavaScript engine, enabling efficient JavaScript execution on the JVM.

bondMicrosoft/bond

A cross-platform framework for working with schematized data, now archived as of March 2025.

JavaVerbalExpressionsVerbalExpressions/JavaVerbalExpressions

A Java library that simplifies constructing complex regular expressions using a fluent builder API.

Keywhizsquare/keywhiz

A system for distributing and managing secrets, now deprecated in favor of HashiCorp Vault.

ZetaSQLgoogle/zetasql

A reusable analyzer framework for the GoogleSQL language, providing parsing, type checking, and semantic analysis for SQL engines.

Joda-Time Androiddlew/joda-time-android

Android-optimized version of Joda-Time for better datetime handling and updated timezone data.

Eclipse Collectionseclipse/eclipse-collections

A comprehensive Java collections framework with optimized data structures and a rich, functional, fluent API.

PackrlibGDX/packr

Packages Java applications (JAR, assets, and a JVM) into native executables for Windows, Linux, and macOS distribution.

packrlibgdx/packr

Packages Java applications (JAR, assets, and a JVM) into native executables for Windows, Linux, and macOS distribution.

flexmark-javavsch/flexmark-java

A fast, extensible CommonMark/Markdown parser for Java with source-level AST and emulation of other markdown processors.

OpenTripPlanneropentripplanner/OpenTripPlanner

An open-source multi-modal trip planner for public transit, walking, bicycling, and mobility services.

HotswapAgentHotswapProjects/HotswapAgent

A Java agent enabling unlimited runtime class and resource redefinition for faster development cycles.

Lanternamabe02/lanterna

A pure Java library for creating text-based GUIs and terminal applications with curses-like functionality.

Jimfsgoogle/jimfs

An in-memory file system for Java implementing java.nio.file APIs, useful for testing and simulation.

rest.lilinkedin/rest.li

A REST+JSON framework for building scalable service architectures with type-safe bindings and asynchronous APIs.