Best Open Source Java Libraries for Windows

Java Libraries for Windows

Libraries Java Windows Clear Filters

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

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1

libjpeg-turbo

SIMD-accelerated libjpeg-compatible JPEG codec library

libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal. On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines. In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs. libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.

16 Reviews

Downloads: 38,034 This Week

Last Update: 2024-01-13
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2

Recaf

The modern Java bytecode editor

Recaf is an open-source Java bytecode editor that simplifies the process of editing compiled Java applications. To make things easier Recaf abstracts away much of the internal class file format. Difficult tasks such as updating stack-frames are done automatically. Along with additional features to assist in the process of editing classes, Recaf is the most feature-rich free bytecode editor available. While Recaf makes bytecode editing a more simple process it does not mean you should dive head-first into editing compiled Java applications without understanding some basic programming concepts and the Java class file architecture.

Downloads: 286 This Week

Last Update: 2026-04-01
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3

UCanAccess

A pure Java JDBC driver for Microsoft Access database files

UCanAccess is a pure Java JDBC Driver implementation which allows Java developers and JDBC client programs to read/write Microsoft Access database (.mdb and .accdb) files. No ODBC needed.

19 Reviews

Downloads: 967 This Week

Last Update: 2021-01-02
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4

Autopsy

Autopsy® is a digital forensics platform and graphical interface

Autopsy® is a digital forensics platform and graphical interface to The Sleuth Kit® and other digital forensics tools. It can be used by law enforcement, military, and corporate examiners to investigate what happened on a computer. You can even use it to recover photos from your camera's memory card. Autopsy was designed to be intuitive out of the box. Installation is easy and wizards guide you through every step. All results are found in a single tree. See the intuitive page for more details. Autopsy was designed to be an end-to-end platform with modules that come with it out of the box and others that are available from third-parties.

Downloads: 88 This Week

Last Update: 2026-05-07
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5

EssentialsX

The modern Essentials suite for Spigot and Paper

EssentialsX is a continuation of the Essentials plugin suite, updated to support modern Minecraft and Spigot versions. It provides countless new features, performance enhancements and fixes that are not available in the original Essentials or Spigot-Essentials. If you're coming from the original Essentials plugin, EssentialsX is a drop-in replacement for Essentials.

Downloads: 56 This Week

Last Update: 2026-05-31
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6

EMV NFC Paycard Enrollment

A Java library used to read and extract data from NFC EMV credit cards

Java library used to read and extract public data from NFC EMV credit cards.

Downloads: 48 This Week

Last Update: 2026-02-09
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7

JFreeChart

JFreeChart is a free (LGPL) chart library for the Java(tm) platform. It supports bar charts, pie charts, line charts, time series charts, scatter plots, histograms, simple Gantt charts, Pareto charts, bubble plots, dials, thermometers and more. *** JFreeChart has moved to GitHub: https://github.com/jfree/jfreechart ***

46 Reviews

Downloads: 205 This Week

Last Update: 2016-05-08
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8

Java Neural Network Framework Neuroph

Neuroph is lightweight Java Neural Network Framework which can be used to develop common neural network architectures. Small number of basic classes which correspond to basic NN concepts, and GUI editor makes it easy to learn and use.

17 Reviews

Downloads: 208 This Week

Last Update: 2020-05-31
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9

JSON-java

A reference implementation of a JSON package in Java

JSON is a light-weight language-independent data interchange format. The JSON-Java package is a reference implementation that demonstrates how to parse JSON documents into Java objects and how to generate new JSON documents from the Java classes.

Downloads: 23 This Week

Last Update: 2026-05-22
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10

Apache Log4j

Apache Log4j 2 is a versatile, feature-rich, efficient logging API

Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist the deployment for various use cases. Log4j is used by 8% of the Maven ecosystem and listed as one of the top 100 critical open source software projects. The project is actively maintained by a team of several volunteers and supported by a big community.

Downloads: 20 This Week

Last Update: 3 days ago
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11

Fast Android Networking

A Complete Fast Android Networking Library that also supports HTTP/2

Fast Android Networking Library is a powerful library for doing any type of networking in Android applications which is made on top of OkHttp Networking Layer. Fast Android Networking Library takes care of each and everything. So you don't have to do anything, just make a request and listen for the response. The recent removal of HttpClient in Android Marshmallow(Android M) made other networking libraries obsolete. No other single library does and everything like making requests, downloading any type of file, uploading file, loading images from the network in ImageView, etc. There are some libraries but they are outdated. No other library provides a simple interface for doing all types of things in networking like setting priority, canceling, etc. As it uses Okio , No more GC overhead in android applications. Okio is made to handle GC overhead while allocating memory. Okio does some clever things to save CPU and memory.

Downloads: 17 This Week

Last Update: 2024-08-18
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12

Gson

A Java serialization/deserialization library to convert Java Objects

Gson is a Java library developed by Google that allows conversion between Java objects and JSON. It enables serialization and deserialization of Java classes to and from JSON format, handling complex and generic types, nulls, custom naming policies, and more. Gson is lightweight, easy to use, and does not require annotation-based configuration, making it a popular choice for JSON processing in Java applications.

Downloads: 15 This Week

Last Update: 2026-04-23
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13

SeriesGuide

Track your favorite TV shows and movies on Android devices

SeriesGuide highlights shows with new episodes and is backed by the huge TV show catalog of TMDb. It can display movies currently in cinemas or released digitally and offers access to the huge movie catalog of TMDb. It also integrates with Trakt to sync your watched episodes and movies. Connect your Trakt account or sign into SeriesGuide Cloud to sync your watched episodes and movies. Hit the share button to post a link to an awesome episode or movie to any Android app, including WhatsApp, Signal, Facebook and Twitter. Visual indicators make it easy to see remaining episodes and to spot unseen episodes. The statistics tool sums how many hours you have spent watching (and still have to).

Downloads: 15 This Week

Last Update: 5 days ago
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14

Spoon

Metaprogramming library to analyze and transform Java source code

Spoon is an open-source library to analyze, rewrite, transform, transpile Java source code. It parses source files to build a well-designed AST with powerful analysis and transformation API. It supports modern Java versions up to Java 20. Spoon is an official Inria open-source project, and member of the OW2 open-source consortium.

Downloads: 14 This Week

Last Update: 2026-06-21
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15

jclasslib bytecode editor

Visualizes all aspects of compiled Java class files

jclasslib bytecode editor is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. Many aspects of class files can be edited in the UI. In addition, it contains a library that enables developers to read and write Java class files and bytecode. All constant pool entries can be edited. Referenced constant pool entries can directly be edited from the context menu that is shown by the "Edit" button of attributes and constant pool entries. Bytecode instructions can be edited from the context menu.

Downloads: 14 This Week

Last Update: 2026-04-23
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16

ConnectBot

ConnectBot is the first SSH client for Android

ConnectBot is a secure shell client for the Android platform. Its ultimate goal is to create a secure connection through which you can use a shell on a remote machine and transfer files back and forth to your phone. ConnectBot is a powerful open source SSH (Secure Shell) client. It can handle several simultaneous sessions, create secure connections in tunnel mode and allows Copy/Paste from other applications. This client allows you to connect to SSH (Secure Shell) servers that typically include UNIX-based servers.

Downloads: 13 This Week

Last Update: 2026-06-09
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17

HikariCP

A solid, high-performance, JDBC connection pool at last

HikariCP is a high-performance JDBC connection pooling library designed to offer minimal overhead and maximum throughput. It aims for simplicity and stability, concentrating on fast connection acquisition and minimal latency under load. Its internals manage a pool of connections aggressively but smartly, with options such as leak detection, timeout thresholds, and adaptive connection retirement. Because it avoids heavy internal locking, it scales well in high-concurrency environments, making it a popular choice in microservices and high-throughput web backends. Metrics and instrumentation hooks (for example, via Dropwizard or Micrometer) allow runtime visibility into pool usage and health. HikariCP’s focus is on doing the essential work of pooling correctly and efficiently, rather than bundling extraneous features.

Downloads: 13 This Week

Last Update: 2026-06-14
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18

JNativeHook

Global keyboard and mouse listeners for Java

JNativeHook is a library to provide global keyboard and mouse listeners for Java. This will allow you to listen for global shortcuts or mouse motion that would otherwise be impossible using pure Java. To accomplish this task, JNativeHook leverages platform-dependent native code through Java's native interface to create low-level system-wide hooks and deliver those events to your application.

Downloads: 13 This Week

Last Update: 2023-08-18
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19

QR Code generator library

High-quality QR Code generator library in Java, TypeScript/JavaScript

This project aims to be the best, clearest library for generating QR Codes. My primary goals are flexible options and absolute correctness. The secondary goals are compact implementation size and good documentation comments. This work is an independent implementation based on reading the official ISO specification documents. I believe that my library has a more intuitive API and shorter code length than competing libraries out there. The library is designed first in Java and then ported to TypeScript, Python, Rust, C++, and C. It is open source under the MIT License. For each language, the codebase is roughly 1000 lines of code and has no dependencies other than the respective language’s standard library.

Downloads: 13 This Week

Last Update: 2024-11-11
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20

LWJGL

Java library that enables cross-platform access to popular native APIs

LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan), audio (OpenAL) and parallel computing (OpenCL) applications. This access is direct and high-performance, yet also wrapped in a type-safe and user-friendly layer, appropriate for the Java ecosystem. LWJGL is an enabling technology and provides low-level access. It is not a framework and does not provide higher-level utilities than what the native libraries expose. As such, novice programmers are encouraged to try one of the frameworks or game engines that make use of LWJGL, before working directly with the library.

Downloads: 11 This Week

Last Update: 2026-02-03
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21

iText

iText for Java represents the next level of SDKs for developers

iText for Java represents the next level of SDKs for developers who want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit, and enhance PDF documents, iText can be a boon to nearly every workflow. iText Suite refers to the complete line of products comprising the open-source iText Core PDF library and its add-ons. The iText Suite is a fully-featured SDK for PDF development that allows you to seamlessly embed extensive PDF functionality into your software or workflows. The iText Suite builds on over a decade of lessons learned from iText 5 (and iTextSharp) development. The latest release of iText, version 8, is a simpler, more performant and extensible library that is ready to handle the increased challenges of today's document workflows, one add-on at a time.

Downloads: 11 This Week

Last Update: 2 days ago
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22

Chronicle Queue

Micro second messaging that stores everything to disk

Micro second messaging that stores everything to disk. With millions of users worldwide, Chronicle Queue is a leading choice for organizations of all sizes seeking a low-latency, high-performance messaging framework. The Chronicle Queue Enterprise version eliminates compatibility issues and allows for the seamless integration and sharing of data between Java, Rust, Python, and C++ libraries. Chronicle Queue is available as a fully native Java, Rust or C++ library, and also supports a Python API. All versions are fully binary compatible.

Downloads: 10 This Week

Last Update: 6 days ago
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23

Tess4J

A Java JNA wrapper for Tesseract OCR API

9 Reviews

Downloads: 62 This Week

Last Update: 2018-05-26
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24

MCProtocolLib

A library for communication with a Minecraft client/server

MCProtocolLib is a simple library for communicating with Minecraft clients and servers. It allows developers to build custom bots, clients, or servers for Minecraft with ease.

Downloads: 9 This Week

Last Update: 2025-01-18
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25

VisualVM

VisualVM is an All-in-One Java Troubleshooting Tool

VisualVM is a visual tool integrating command line JDK tools and lightweight profiling capabilities. Designed for both development and production time use. Use Apache Ant 1.9.9 or above and Oracle JDK 8 to build VisualVM from this repository. VisualVM monitors and troubleshoots applications running on Java 1.4+ from many vendors using various technologies including jvmstat, JMX, Serviceability Agent (SA) and Attach API. VisualVM perfectly fits all the requirements of application developers, system administrators, quality engineers and end users. VisualVM automatically detects and lists locally and remotely running Java applications (jstatd must be running on the remote host). You can also define applications manually by JMX connection. For each process VisualVM shows basic runtime information: PID, main class, arguments passed to java process, JVM version, JDK home, JVM flags and arguments and System properties.

Downloads: 9 This Week

Last Update: 2026-02-15
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