Open Source Java Software - Page 52
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Browse free open source Java Software and projects below. Use the toggles on the left to filter open source Java Software by OS, license, language, programming language, and project status.
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DSL-JSON library
High performance JVM JSON library
Fastest JVM (Java/Android/Scala/Kotlin) JSON library with advanced compile-time data binding support. Java JSON library designed for performance. Originally built for invasive software composition with DSL Platform compiler. v1 core library was targeting Java6, while v2 targets Java8. So there is no need anymore for dsl-json-java8 project and instead, just dsl-json project should be referenced. From v2 only a single annotation processor is supported, which was previously in the java8 project. Joda and some other specific libraries were removed. If you still need converters for those types, you need to include them in your project. -
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Discovery
Nepxion Discovery is a solution for Spring Cloud
Nepxion Discovery is a solution for Spring Cloud with blue green, gray, route, blacklist, limitation, circuit breaker, degrade, isolation, monitor, tracing, dye, failover, async agent. Only one or more services are upgraded at a time, the upgrade is completed and monitored and observed, and this process is performed continuously until all the old versions in the cluster are upgraded to the new version. In the process of stopping the old version, it is impossible to accurately calculate whether the old version has completed the work it is performing, and it needs to be judged by the business itself. Full-link custom gateways, service filters, and load balancing strategies trigger blue-green grayscale release. Full link local and remote, local and global non-parameterized rule-driven strategy. Full-link blue-green-gray release scheduling modeling and traffic detection. -
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DoKit
A platform for the life cycle of pan-front-end product development
DoKit is a debugging and quality-of-experience toolkit for mobile (primarily Android) apps that provides an in-app overlay with tools for inspection, monitoring, and interaction. It offers features like CPU/memory monitoring, frame rate detection, network logging, view hierarchy inspection, and plugin support to expand capabilities. Developers can interactively explore UI layouts, measure layout times, simulate slow networks, or trace touch events—all while the app is running on the device. DoKit aims to shorten feedback loops by surfacing internal state and metrics in situ rather than relying solely on external logging or tooling. Because it’s modular, teams can include only the subsystems relevant to their needs and disable others in production builds. The result is a rich, on-device observability layer that supports debugging performance, layout bug hunts, and UX tuning without deeply invasive instrumentation. -
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Dolphin Scheduler
A distributed and extensible workflow scheduler platform
Apache DolphinScheduler is a distributed and extensible workflow scheduler platform with powerful DAG visual interfaces, dedicated to solving complex job dependencies in the data pipeline and providing various types of jobs available `out of the box`. Dedicated to solving the complex task dependencies in data processing, making the scheduler system out of the box for data processing. Decentralized multi-master and multi-worker, HA is supported by itself, overload processing. All process definition operations are visualized, Visualization process defines key information at a glance, One-click deployment. Support multi-tenant. Support many task types e.g., spark,flink,hive, mr, shell, python, sub_process. Support custom task types, Distributed scheduling, and the overall scheduling capability will increase linearly with the scale of the cluster. -
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DroidParts
Carefully crafted Android framework
DroidParts is a carefully crafted Android framework. RESTClient for GETting, PUTting, POSTing, DELETing & InputStream-getting, also speaks JSON. ImageFetcher to asynchronously attach images to ImageViews, with caching, cross-fade & transformation support. -
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Elements of Programming Interviews
Method stubs and test cases for Elements of Programming Interviews
This repository contains method stubs and tests of the problems from Elements Of Programming Interviews by Adnan Aziz, Tsung-Hsien Lee, and Amit Prakash. This book is also available in Python and C++. This repository contains solutions to problems from the book "Elements of Programming Interviews," focusing on interview preparation and algorithm practice. -
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FABRevealMenu
A general purpose Android UI library to show a user show menu
A simple general-purpose UI library to create a custom user-defied menu in a modern way with your favorite Floating action button. It incorporates a lollipop circular reveal view with cool animations somewhat inspired by Google Material Design guidelines. -
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FFmpeg-Android-Java
Android java library for FFmpeg binary
FFmpeg Android java is a java library that simplifies your task of using ffmpeg in Android project which I've compiled using FFmpeg-Android. -
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FXGL
Java/JavaFX/Kotlin Game Library (Engine)
No installation or setup required. "Out of the box": Java 8-17, Win/Mac/Linux/Android 8+/iOS 11.0+/Web. Simple and clean API, higher level than other engines. Superset of JavaFX, no need to learn new UI API. Real-world game development techniques, entity-component, interpolated animations, particles, and many more. Games are easily packaged into a single executable .jar or native images. Any 2D game (side-scroller/platformer/arcade/RPG). Any business application with complex UI controls/animations. Hobby/academic/commercial projects. Teaching/learning/improving game development skills. -
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Fadeboard
Android Keyboard transforms simple letters into special characters
FadeBoard is a niche Android keyboard that converts typed text into special Unicode characters—designed to circumvent basic text filters and content restrictions. It provides a playful tool to make messages less detectable by simplistic moderation. -
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FirebaseUI for Android
Optimized UI components for Firebase
FirebaseUI is an open-source library for Android that allows you to quickly connect common UI elements to Firebase APIs. A compatible FirebaseUI client is also available for iOS. FirebaseUI has separate modules for using Firebase Realtime Database, Cloud Firestore, Firebase Auth, and Cloud Storage. To get started, see the individual instructions for each module. FirebaseUI is published as a collection of libraries separated by the Firebase API they target. Each FirebaseUI library has a transitive dependency on the appropriate Firebase SDK so there is no need to include those separately in your app. After the project is synchronized, we're ready to start using Firebase functionality in our app. There is a sample app in the app/ directory that demonstrates most of the features of FirebaseUI. -
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FolioReader
A Java ePub reader and parser framework for Android
FolioReader-Android is an EPUB reader written in Java and Kotlin. -
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Freeline
A fast build tool for Android, an alternative to Instant Run
Freeline is a super fast build tool for Android and an alternative to Instant Run. Caching reusable class files and resource indices, it enables incremental building Android apps, and optionally deploying the updates to your device by hot swap. Developed and used by Ant Fortune (about us) Android Team, Freeline has been significantly saving time in daily work. Inspiring by Buck and Instant Run but faster than ever, Freeline can make an incremental build in just a few seconds. No more recompile and reinstall again and again before seeing your modifications, Freeline brings life-changing development experience for Android. Freeline splits the build task into several small tasks that run concurrently. It makes full use of the compiled cache files to implement a real incremental build and uses some components of Buck such as dx and DexMerger to speed up the build tasks. -
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Fresco
An Android library for managing images and the memory they use
Fresco’s image pipeline will load images from the network, local storage, or local resources. To save data and CPU, it has three levels of cache; two in memory and another in internal storage. Fresco’s Drawee shows a placeholder for you until the image has loaded and then automatically shows the image when it arrives. When the image goes off-screen, it automatically releases its memory. A decompressed image - an Android Bitmap - takes up a lot of memory. This leads to more frequent runs of the Java garbage collector. This slows apps down. The problem is especially bad without the improvements to the garbage collector made in Android 5.0. On Android 4.x and lower, Fresco puts images in a special region of Android memory. It also makes sure that images are automatically released from memory when they’re no longer shown on screen. This lets your application run faster - and suffer fewer crashes. -
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Frouros
Frouros is an open-source Python library for drift detection
Frouros is a Python library for drift detection in machine learning systems that provides a combination of classical and more recent algorithms for both concept and data drift detection. -
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GPSLogger
Lightweight GPS Logging Application For Android
GPSLogger is an Android app that logs GPS information to various formats (GPX, KML, CSV, NMEA, Custom URL) and has options for uploading (SFTP, OpenStreetMap, Google Drive, Dropbox, Email). This app aims to be as battery efficient as possible. GPSLogger uses the GPS capabilities of your Android phone to log coordinates to GPS format files at regular intervals. This can be particularly useful if you want to geotag your photos after a day out or share your travel route with someone. The purpose of this application is to be battery efficient to save you battery power when abroad and last as long as possible. -
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Gitblit
pure java git solution
Gitblit is an open-source, pure Java stack for managing, viewing, and serving Git repositories. It's designed primarily as a tool for small workgroups who want to host centralized repositories. Gitblit GO is an integrated, single-stack solution based on Jetty. You do not need Apache httpd, Perl, Git, or Gitweb. Should you want to use some or all of those, you still can; Gitblit plays nice with the other kids on the block. This is what you should download if you want to go from zero to Git in less than 5 mins. Gitblit WAR is what you should download if you already have a servlet container available that you wish to use. Jetty 6/7/8 and Tomcat 6/7 are known to work. Generally, any Servlet 2.5 or Servlet 3.0 container should work. Gitblit can be used as a dumb repository viewer with no administrative controls or user accounts. Gitblit can be used as a complete Git stack for cloning, pushing, and repository access control. -
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Glowstone
Customizable and compatible open source server for Minecraft
A fast, customizable and compatible open-source server for Minecraft: Java Edition. Glowstone is a lightweight, from scratch, open-source Minecraft server written in Java that supports plugins written for the Bukkit API and its major forks, Spigot and Paper. The main goals of the project are to provide a lightweight implementation of the Bukkit API and Minecraft server where exact vanilla functionality is not needed or higher performance is desired than the official software can deliver. Glowstone makes use of a thread-per-world model and performs synchronization only when necessitated by the Bukkit API. -
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GraalVM
Run programs faster anywhere
GraalVM is a high-performance multilingual runtime. It is designed to accelerate the execution of applications written in Java and other JVM languages while also providing runtimes for JavaScript, Ruby, Python, etc. Increase application throughput and reduce latency. Compile applications into small self-contained native binaries. Seamlessly use multiple languages and libraries. Advanced optimizing compiler that generates fast lean code which requires fewer compute resources. Native binaries start up instantly and deliver peak performance with no warm up time. Leverage the best features and libraries of popular languages in a single app with no overhead. Debug, monitor, profile, and optimize resource consumption in Java and across multiple languages. Enterprise version provides all Community features along with higher performance and enhanced security. Additional ahead-of-time compilation optimizations and 24/7/365 support from Oracle. -
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Grafika
Grafika test app
Welcome to Grafika, a dumping ground for Android graphics & media hacks. A collection of hacks exercising graphics features. An SDK app, developed for API 18 (Android 4.3). While some of the code may work with older versions of Android, some sporatic work is done to support them. Open source (Apache 2 license), copyright by Google. So you can use the code according to the terms of the license, A perpetual work-in-progress. It's updated whenever the need arises. To some extent, Grafika can be treated as a companion to the Android System-Level Graphics Architecture document. The doc explains the technology that the examples rely on, and uses some of Grafika's activities as examples. Features are added to Grafika as the need arises, often in response to developer complaints about correctness or performance problems in the platform. -
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GraphicsFuzz
A testing framework for automatically finding and simplifying bugs
GraphicsFuzz is a framework developed by Google for testing and fuzzing graphics drivers using automatically generated GLSL shaders. It helps identify security vulnerabilities, driver crashes, and rendering inconsistencies in OpenGL and Vulkan drivers by feeding them randomized but valid shader programs. Originally developed through academic research, GraphicsFuzz automates the process of minimizing and analyzing problematic shaders, helping hardware vendors and driver developers improve the reliability and robustness of their graphics stack. -
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Grasscutter
A server software reimplementation for a certain anime game
Grasscutter is an open-source Java server reimplementation for a certain anime-style online game, created for private server emulation and research. It uses Java 17, MongoDB, and Gradle, and it has an ecosystem that includes documentation, a launcher, plugins, and community tooling. The project allows users to run a compatible server environment for specific supported game client versions, but it is not actively maintained in the same way it once was. Current documentation warns that version matching matters and that support is limited, especially beyond the older supported release range. Grasscutter is most relevant to developers interested in reverse engineering, server emulation, game protocol research, and modding communities. Because it interacts with proprietary game clients and services, it should be used only in lawful, authorized, and non-commercial contexts. -
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Hazelcast
Open-source distributed computation and storage platform
Hazelcast is a streaming and memory-first application platform for fast, stateful, data-intensive workloads on-premises, at the edge or as a fully managed cloud service. Hazelcast is a distributed computation and storage platform for consistently low-latency querying, aggregation and stateful computation against event streams and traditional data sources. It allows you to quickly build resource-efficient, real-time applications. You can deploy it at any scale from small edge devices to a large cluster of cloud instances. A cluster of Hazelcast nodes share both the data storage and computational load which can dynamically scale up and down. When you add new nodes to the cluster, the data is automatically rebalanced across the cluster and currently running computational tasks (known as jobs) snapshot their state and scale with processing guarantees. -
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Helidon
Java libraries for writing microservices
Helidon is a cloud-native, open‑source set of Java libraries for writing microservices that run on a fast web core powered by Netty. Helidon Níma is the first Java microservices framework based on virtual threads. Helidon is designed to be simple to use, with tooling and examples to get you going quickly. Since Helidon is simply a collection of Java libraries running on a fast Netty core, there is no extra overhead or bloat. Helidon supports MicroProfile and provides familiar APIs like JAX-RS, CDI and JSON-P/B. Our implementation runs on our fast Helidon Reactive WebServer. Helidon Reactive WebServer provides a modern functional programming model and runs on top of Netty. Lightweight, flexible and reactive, the Helidon WebServer provides a simple-to-use and fast foundation for your microservices. -
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Helios
Docker container orchestration platform
This project was created when there were no open-source container orchestration frameworks. Since the advent of Kubernetes and other tools, we've stopped adding new features to helios and are now switching to other tools like Kubernetes. This project will no longer have new features or accept PRs for new features. We will continue to accept bug fixes, however. Helios is a Docker orchestration platform for deploying and managing containers across an entire fleet of servers. Helios provides a HTTP API as well as a command-line client to interact with servers running your containers. It also keeps a history of events in your cluster including information such as deploys, restarts, and version changes.
