Browse free open source Java Libraries and projects below. Use the toggles on the left to filter open source Java Libraries by OS, license, language, programming language, and project status.

  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

    Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
    Start Free
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 1
    SwiftGantt
    SwiftGantt is a opensource Java swing Gantt Chart component that lets you to display project schedule as Gantt Chart, either client-side or server-side application. It is intended to be flexible, compatible and easy to use.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    A small swing calendar bean for displaying monthly, weekly and daily items. The purpose of the bean is to provide an as flexible as possible reusable gui calendar component. The extensible toolbar provides view selection and navigation. Items can be edited in any of the views; status, start and & times and description can all be modified. The bean can be installed into most IDEs as it follows the JavaBean standard. See the wiki for instructions.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    Swing Simple is a set of Java Swing libraries meant to simplify the development of Swing and AWT components. These include a process viewer, a CSS-like Layout Manager and others.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    Synder

    Synder

    Atom/RSS/SearchSuggestion/OPML processing framework

    Synder is an Atom/RSS/SearchSuggestion/OPML processing framework It is Optimized For Android, but works with Java SE/EE. Synder has a small-footprint, low memory consumption. The only dependency for parsing is a SAX2 implementation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Already Paying for an RMM? Get 50% Off Splashtop AEM Icon
    Already Paying for an RMM? Get 50% Off Splashtop AEM

    Switch to Splashtop AEM and save up to 50% in your first year

    Automated OS and third-party patching for Windows and macOS, CVE prioritization with AI patch summaries, and built-in remote control that also supports Linux. Qualifying organizations switching from another RMM get up to 50% off year one.
    Get Started
  • 5
    Systems Biology Simulation Core Library

    Systems Biology Simulation Core Library

    Accurate and efficient Java library that simulates biological models

    This project has been moved to https://github.com/draeger-lab/SBSCL.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    TCR Neuroph -Text Character Recognition
    TCR Neuroph - Text Character Recognition is java tool developed to recognize scanned text , using Java Neural Network Framework - Neuroph
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    TableView for Android

    TableView for Android

    Powerful Android library for displaying complex data structures

    TableView is a powerful Android library for displaying complex data structures and rendering tabular data composed of rows, columns and cells. TableView relies on a separate model object to hold and represent the data it displays. This repository also contains a sample app that is designed to show you how to create your own TableView in your application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Java does not provide object properties concept. Tag4J is similar to object properties, but not exact, it is different in many aspects. Tag4J basically provides standard way to add / remove tags [Key-Value pairs] .
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9

    TagEnabler

    Java library for check unsafe html

    Библиотека позволяет получая опасный html от клиента, протым способом сделать его безопасным не разрушив сам код. Для достижения этой цели достаточно определиться какие теги и опции к тегам пользователю разрешено использовать. Можно также указать каждой опции какому регулярному выражению она должна соответствовать.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Start Free
  • 10
    JSP taglibrary used to integrate the Java Expert System Shell (Jess) into Java JSP pages.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11

    Tapestry Testify

    Enhanced testing facilities for Tapestry 5

    Downloads: 0 This Week
    Last Update:
    See Project
  • 12

    Tapestry XPath

    Allows you to query the Tapestry DOM using XPath

    Downloads: 0 This Week
    Last Update:
    See Project
  • 13

    TcpChannel

    A simple, non-blocking, NIO-based, TCP socket API for Java

    TcpChannel is a simple, small API to allow processes to communicate using TCP sockets based on NIO implementations. The API presents the communication between processes using an observer pattern for handling received messages and an asynchronous send method for sending. Generally, writing NIO socket handling is non-trivial. TcpChannel exists to let Java developers write processes that communicate with each other using a simple send and receive pattern.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Telegram Bot Java Library

    Telegram Bot Java Library

    Java library to create bots using Telegram Bots API

    A simple-to-use library to create Telegram Bots in Java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    A java based TemplateMonster WebAPI client. It now provides native Java access to the ScreenShot service and the TemplateSources service.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    TengineKit

    TengineKit

    TengineKit - Free, Fast, Easy, Real-Time Face Detection

    Free, Fast, Easy, Real-Time Face Detection & Face Landmarks & Face Attributes & Hand Detection & Hand Landmarks & Body Detection & Body Landmarks & Iris Landmarks & Yolov5 SDK On Mobile. TengineKit is an easy-to-integrate AI algorithm SDK. At present, it can run on various mobile phones at very low latency. We will continue to update this project for better results and better performance!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17

    TennisScore

    Java classes to count tennis scores

    This Java project contains source code to count tennis scores. It also contains J2ME to build a SmartPhone application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Terrapin
    The Terrapin library provides a LOGO-esque Turtle drawing object in Processing.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19

    Test result reporter

    Java lib for writing test results to TCM

    Java library for reporting results of automated test cases back to various Test case management tools.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    TestNG Data Binding

    TestNG Data Binding

    Provides data binding from various data sources to TestNG test methods

    This project provides data binding from various data sources to TestNG test method parameters. Currently implemented is the binding from CSV, Properties, Text and XML files. Supported are test input parameters as well as test output parameters. Binding is provided for all primitive Java data types including Strings, lists of those, Java Beans, lists of Java Beans and enums. As the framework is plugin based support for new data sources can easily be added by implementing a new plugin. Please see the JavaDoc accessible on the project's website for detailed information. Please see the wiki for the maven coordinates if you want to add the TestNG Data Binding framework as a dependency to your maven project.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    A wrapper around the leJOS NXJ (http://lejos.sourceforge.net/) API that allows easy test-driven development (TDD) of robot code in Java with JUnit.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Testcontainers Java

    Testcontainers Java

    Testcontainers is a Java library that supports JUnit tests

    Testcontainers for Java is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container. Use a containerized instance of a MySQL, PostgreSQL or Oracle database to test your data access layer code for complete compatibility, but without requiring complex setup on developers' machines and safe in the knowledge that your tests will always start with a known DB state. Any other database type that can be containerized can also be used. For running your application in a short-lived test mode with dependencies, such as databases, message queues or web servers. Use containerized web browsers, compatible with Selenium, for conducting automated UI tests. Each test can get a fresh instance of the browser, with no browser state, plugin variations or automated browser upgrades to worry about. And you get a video recording of each test session.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    This library offers an API to useful tools that can be utilized for any text mining project. More details will be mentioned in the project's future documentation
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    The Panini Language

    The Panini Language

    Better Modularity, Better Concurrency

    This project makes the compiler and tools for the Panini language available. A central goal of the Panini language is to make concurrent programming easier and less error-prone. The main new feature in Panini is called a capsule. A capsule is like an actor but better because it largely retains the traditional approach for reasoning about programs as a sequence of operations, abstracts away all details of thread creation and locking, and supports fully-automatic compile-time analysis of common concurrency hazards. Panini is simple and efficient. We invite you to try it out. Downloads are available from http://paninij.org/download/
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25

    ThinORM

    A lightweight ORM that does not require annotations.

    This project was the result of working on systems constrained to versions of Java < 1.5 and including a great deal of code dealing with object persistence. This project was essentially a proof-of-concept to determine whether or not I could create, essentially, an alternative to JPA that did not rely on annotations. I was able to create a working system, and a fairly lightweight one at that, but it would require a great deal of work to be production ready.
    Downloads: 0 This Week
    Last Update:
    See Project