Open Source Java Software - Page 58
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Java Software
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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PlaceHolderView
This library provides advance views for lists and stacks
PlaceHolderView is an Android library for building advanced lists, expandable collections, infinite feeds, and swipeable card stacks. Some components extend RecyclerView, while others use independent implementations tailored to gesture-driven interfaces. Its annotation-based API reduces adapter and binding boilerplate by generating binding classes during compilation. PlaceHolderView offers a standard list container, an infinite-scrolling variant, and a parent-child expandable view. SwipePlaceHolderView supports Tinder-style card stacks, while SwipeDirectionalView reports swipe directions and touch events. The library includes Java and Kotlin integration paths, although its dependencies and support-library examples reflect an older Android ecosystem. -
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PowerJob
Enterprise job scheduling middleware with distributed computing
PowerJob is an open-source distributed computing and job scheduling framework which allows developers to easily schedule tasks in their own application. Front-end page is provided and developers can manage their task, monitor the status, check the logs online, etc. Four timing strategies are supported, including CRON expression, fixed rate, fixed delay and OpenAPI which allows you to define your own scheduling policies, such as delaying execution. Four execution modes are supported, including stand-alone, broadcast, Map and MapReduce. Distributed computing resources could be utilized in MapReduce mode, try the magic out here! Both job dependency management and data communications between jobs are supported. Developers can write their processors in Java, Shell, Python, and will subsequently support multilingual scheduling via HTTP. -
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ProgrammingFonts
This is a collection of programming fonts
This is a collection of programming fonts, just share this with the programmers. Now there are 108 kinds of fantastic fonts! If you have a try of another kind of programming font, maybe you can have a new different feeling of coding which will make you feel fabulous, so just have a try! Monospaced is the most important feature for programming fonts because monospaced fonts are easy for coding and must be easy to check or align or compare. Most of the important and popular programming languages are built on English characters, so the programming fonts must support English characters. All of the characters must be easily identified. There must be no confusion about some similar characters, such as l and 1, o and 0, i and l, and g and 9. -
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Prometheus JVM Client
Prometheus instrumentation library for JVM applications
It supports Java, Clojure, Scala, JRuby, and anything else that runs on the JVM. If you use Maven, you can simply reference the assets below. The latest version can be found on in the maven repository for io.prometheus. By default, counters, histograms, and summaries export an additional series suffixed with _created and a value of the unix timestamp for when the metric was created. Building the repository needs Java 11 (The project the project still supports Java 6 and Java versions > 11 dropped support for Java 6 output). We recommend to use an up-to-data Java 8 installation. The project provides the maven wrapper and therefore no local maven installation is needed. To build the repository just call ./mvnw verify. -
Cut Data Warehouse Costs by 54%BigQuery delivers 54% lower TCO with exabyte scale and flexible pricing. Free migration tools handle the SQL translation automatically.
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QKSMS
A beautiful SMS messenger for Android
Fall in love with texting all over again with QKSMS! QKSMS is a beautiful, simple and customizable open source replacement to the stock messaging app on Android. It's got a clean, clutter-free intuitive design that lets you focus on what matters, plus millions of colors to choose from to make the theme of the entire app truly your own. QKSMS has some powerful features, including photo sharing, group chat, conversation blocking, message backup and restore and more. It's got everything you need from a text messaging app, plus all the fun features that make for a great text messaging experience. Simply put, QKSMS makes texting magical again, just the way it should be! -
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RIBs
Uber's cross-platform mobile architecture framework
RIBs is the cross-platform architecture framework behind many mobile apps at Uber. The name RIBs is short for Router, Interactor and Builder, which are core components of this architecture. This framework is designed for mobile apps with a large number of engineers and nested states. Shared architecture across iOS and Android. Build cross-platform apps that have similar architecture, enabling iOS and Android teams to cross-review business logic code. Testability and Isolation. Classes must be easy to unit test and reason about in isolation. Individual RIB classes have distinct responsibilities like routing, business, view logic, creation. Plus, most RIB logic is decoupled from child RIB logic. This makes RIB classes easy to test and reason about independently. Tooling for developer productivity. RIBs come with IDE tooling around code generation, memory leak detection, static analysis and runtime integrations. -
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Re-learning Java Design Patterns
Design-pattern learning project based on "Relearning Java Design"
Re-learning Java Design Patterns is a Java design-pattern learning project based on the book Relearning Java Design Patterns. Instead of presenting design patterns as abstract theory, it teaches them through practical internet business scenarios. The repository includes examples drawn from transactions, marketing, flash-sale systems, middleware, source-code analysis, and other real development contexts. Its goal is to show how design patterns solve concrete engineering problems rather than simply naming pattern structures. The project is useful for Java developers who want to improve architecture thinking, code extensibility, and implementation discipline. It also serves as a companion codebase for readers who want to study each pattern through runnable Java examples. -
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React Native Template TypeScript
Clean and minimalist React Native template for a quick start
This template offers a clean and minimalist setup for React Native projects using TypeScript. It provides a solid starting point for building type-safe mobile applications. -
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Retrofit
Type-safe HTTP client for Android and Java by Square
Retrofit is a type-safe HTTP client for Android and Java developed by Square. It allows developers to define REST API calls using simple interface annotations, automatically converting responses into Java objects using converters like Gson or Moshi. Retrofit greatly simplifies network requests by abstracting away boilerplate code, making API integration in mobile and Java apps seamless and maintainable. -
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Robust
Android HotFix solution with high compatibility and high stability
Robust is an Android HotFix solution with high compatibility and high stability. Robust can fix bugs immediately without a reboot. Robust is an Android HotFix solution with high compatibility and high stability. Robust can fix bugs immediately without publishing apk. Support fixing at method level,including static methods. Support add classes and methods. Support ProGuard,including inline methods or changing methods' signature. AutoPatch will generate patch for Robust automatically. You should modify inner classes' private constructors to public modifier. Classes added in patch should be static nested classes or non-inner classes,and all fields and methods in added class should be public. -
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Simple Binary Encoding (SBE)
Simple Binary Encoding (SBE) - High Performance Message Codec
SBE is an OSI layer 6 presentation for encoding and decoding binary application messages for low-latency financial applications. This repository contains the reference implementations in Java, C++, Golang, C#, and Rust. More details on the design and usage of SBE can be found on the Wiki. An XSD for SBE specs can be found here. Please address questions about the specification to the SBE FIX community. For the latest version information and changes see the Change Log with downloads at Maven Central. The Java and C++ SBE implementations work very efficiently with the Aeron messaging system for low-latency and high-throughput communications. The Java SBE implementation has a dependency on Agrona for its buffer implementations. -
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SiteWhere
An industrial strength open-source application platform for the IoT
SiteWhere is an industrial-strength, open-source IoT Application Enablement Platform that facilitates the ingestion, storage, processing, and integration of IoT device data at a massive scale. The platform leverages a microservices architecture that runs on top of cutting-edge technologies such as Kubernetes, Istio, and Kafka in order to scale efficiently to the loads expected in large IoT projects. SiteWhere embraces a distributed architecture that runs on Kubernetes and provides both infrastructures such as highly-available databases and MQTT brokers as well as microservices to facilitate various aspects of IoT project development. The platform is built with a framework approach using clearly defined APIs so that new technologies may easily be integrated as the IoT ecosystem evolves. SiteWhere is composed of Java-based microservices which are built as Docker images and deployed to Kubernetes for orchestration. -
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Slack SDK for Java
Slack Developer Kit (including Bolt for Java) for any JVM languages
Slack SDK for Java supports the Slack platform in a Java idiomatic way. The SDK written in Java so developers can use it in any JVM language including Kotlin, Groovy, and Scala. If what you want to do is call Slack APIs in your existing services, we recommend using only the Slack API Client. If instead, you’re developing a new modern and interactive Slack app, we recommend Bolt for it. The framework enables developers to focus on the essential parts of their apps without being bothered by trifles. -
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Socket.IO-client Java
A Socket.IO client library for Java
This is the Socket.IO Client Library for Java, which is simply ported from the JavaScript client. The latest artifact is available on Maven Central. There are several ways to handle events that are transmitted between the server and the client. Add the listener function to the end of the listeners array for the event named eventName. Add a one-time listener function for the event named eventName. Remove the specified listener from the listener array for the event named eventName. Remove all listeners for the specific eventName. Remove all listeners (for any event). Besides emitting and listening to events, the Socket instance has a few attributes that may be of use in your application. Each new connection is assigned a random 20-characters identifier. -
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Soot
Soot - A Java optimization framework
Soot is a Java optimization framework. It provides four intermediate representations for analyzing and transforming Java bytecode. Baf: a streamlined representation of bytecode which is simple to manipulate. Jimple: a typed 3-address intermediate representation suitable for optimization. Shimple: an SSA variation of Jimple. Grimp: an aggregated version of Jimple suitable for decompilation and code inspection. -
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Spring AI
An Application Framework for AI Engineering
Spring AI is a framework within the Spring ecosystem that simplifies the integration of artificial intelligence capabilities into Java applications by providing abstractions over various AI services and models. It is designed to align with familiar Spring development patterns, allowing developers to incorporate AI features such as chat, embeddings, and prompt handling using consistent APIs. The framework supports multiple providers, including OpenAI, Azure OpenAI, and other compatible services, enabling flexibility in deployment strategies. It focuses on production readiness by offering features such as configuration management, observability, and integration with Spring Boot applications. Spring AI also includes support for retrieval-augmented generation, enabling applications to connect language models with structured and unstructured data sources. Its architecture encourages modular design, making it easier to extend or swap components without rewriting large parts of the system. -
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Spring AI Alibaba Examples
Spring AI Alibaba examples for building and testing AI apps
Spring AI Alibaba Examples provides a collection of example projects that demonstrate how to use Spring AI and Spring AI Alibaba across different scenarios, from basic setups to more advanced AI applications. It is designed to help developers understand core concepts, explore practical implementations, and follow best practices when building AI-powered systems using the Spring ecosystem. Each module focuses on a specific use case such as chat, image processing, audio handling, graph workflows, and retrieval-augmented generation. The examples highlight how to integrate AI models, manage prompts, handle memory, and build multi-model or multi-agent workflows. Developers can explore individual project folders for detailed instructions and implementation guidance. Spring AI Alibaba Examples also supports experimentation through playground modules and encourages contributions to expand real-world AI use cases and improve development practices. -
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Spring Boot Demo
A project for in-depth study and practical application of Spring Boot
This repository is a hands-on, “deep learning by doing” collection of Spring Boot demos that you can run and study module by module. It currently includes 66 planned integrations (with 55 completed) spanning monitoring, logging, templating, data access, caching, messaging, scheduling, search, security, and more. The master branch targets Spring Boot 2.1.0.RELEASE with a parent POM that centralizes common dependency versions; the older v-1.5.x branch is frozen and its contents are being migrated to master. Each demo ships with its own README and some require pre-initialized database data before launching. The project outlines a standard development environment (JDK 8+, Maven 3.5+, IntelliJ IDEA with Lombok, MySQL 5.7+) and simple run instructions—clone, open in IDEA, import Maven, and run the module’s Application class. It’s intended as a practical reference you can fork, explore, and extend. -
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Spring Boot Examples
Spring Boot tutorials, technology stack example code
spring-boot-examples is a collection of small, runnable projects that teach Spring Boot “by example,” emphasizing minimal dependencies and practical, copy-pasteable patterns. The repository provides multiple standalone demos (e.g., web, scheduling, persistence, messaging, caching, Docker) to help beginners quickly grasp common components and idioms. The author notes that all examples have been updated to Spring Boot 3.0, with earlier 1.x and 2.x code paths kept accessible for reference. Each sample focuses on a single topic—such as Web MVC, WebFlux, Thymeleaf, JPA/MyBatis CRUD, file upload, Redis/MongoDB, RabbitMQ, and containerization—so you can learn one concept at a time and compose them later. There are also demos for testing, packaging (JAR/WAR), and Docker Compose scenarios that combine Spring Boot with Nginx and MySQL. If you want additional topics covered, the maintainer invites requests via issues so the set can keep growing with the community’s needs. -
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Spring Integration
Provides an extension of the Spring programming model
Extends the Spring programming model to support the well-known Enterprise Integration Patterns. Spring Integration enables lightweight messaging within Spring-based applications and supports integration with external systems via declarative adapters. Those adapters provide a higher-level of abstraction over Spring’s support for remoting, messaging, and scheduling. Spring Integration’s primary goal is to provide a simple model for building enterprise integration solutions while maintaining the separation of concerns that is essential for producing maintainable, testable code. -
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Spring Security
Authentication and access-control framework
Spring Security is a powerful and highly customizable authentication and access-control framework. It is the de-facto standard for securing Spring-based applications. Spring Security is a framework that focuses on providing both authentication and authorization to Java applications. Like all Spring projects, the real power of Spring Security is found in how easily it can be extended to meet custom requirements. Spring Security uses a Gradle-based build system. In the instructions, ./gradlew is invoked from the root of the source tree and serves as a cross-platform, self-contained bootstrap mechanism for the build. Be sure that your JAVA_HOME environment variable points to the jdk-11 folder extracted from the JDK download. -
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Synthea Patient Generator
Synthetic Patient Population Simulator
SyntheaTM is an open-source, synthetic patient generator that models the medical history of synthetic patients. Our mission is to provide high-quality, synthetic, realistic but not real, patient data and associated health records covering every aspect of healthcare. The resulting data is free from cost, privacy, and security restrictions, enabling research with Health IT data that is otherwise legally or practically unavailable. The models used to generate synthetic patients are informed by numerous academic publications. Our synthetic populations provide insight into the validity of this research and encourage future studies in population health. Synthetic data establishes a risk-free environment for Health IT development and experimentation. This includes the evaluation of new treatment models, care management systems, clinical decision support, and more. -
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TauCeti Classic
Frankenstein lived
TauCetiClassic is an open source fork of Space Station 13 maintained by the Tau Ceti Station community. It builds upon the original SS13 codebase, offering a distinct roleplay-focused experience with custom mechanics, sprites, and maps. The repository includes the full game source, assets, and build scripts necessary to host servers and contribute to development. TauCetiClassic emphasizes immersive roleplay scenarios, detailed station environments, and unique content compared to other SS13 forks. The project is actively developed, with ongoing updates from its community of players and coders. By extending SS13, it provides both a playable multiplayer environment and a collaborative platform for experimentation. -
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TypeDB
TypeDB: a strongly-typed database
TypeDB is a strongly-typed database with a rich and logical type system. TypeDB empowers you to tackle complex problems, and TypeQL is its query language.TypeDB is a database with a rich and logical type system. TypeDB empowers you to solve complex problems, using TypeQL as its query language. TypeDB provides a strong type system for developers to break down complex problems into meaningful and logical systems. Through TypeQL, TypeDB provides powerful abstractions over low-level and complex data patterns. TypeDB allows you to model your domain based on logical and object-oriented principles. Composed of entity, relationship, and attribute types, as well as type hierarchies, roles, and rules, TypeDB allows you to think higher-level, as opposed to join-tables, columns, documents, vertices, edges, and properties.Types provide a way to describe the logical structures of your data, allowing TypeDB to validate that your code inserts and queries data correctly. -
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TypeSpec
Language for defining cloud service APIs and shapes
TypeSpec is a language for defining cloud service APIs and shapes. TypeSpec is a highly extensible language with primitives that can describe API shapes common among REST, OpenAPI, gRPC, and other protocols. TypeSpec is excellent for generating many different API description formats, client and service codes, documentation, and many other assets. All this while keeping your TypeSpec definition as a single source of truth. Using TypeSpec, you can create reusable patterns for all aspects of an API and package those reusable patterns into libraries. These patterns establish "guardrails" for API designers and make it easier to follow best practices than to deviate from them. TypeSpec also has a rich linter framework with the ability to flag anti-patterns as well as an emitter framework that lets you control the output to ensure it follows the patterns you want.
