Open Source Java Software - Page 36
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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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AGI (Android GPU Inspector)
Android GPU Inspector
Android GPU Inspector (AGI) is a desktop tool for profiling, tracing, and debugging graphics workloads running on Android devices. It helps developers analyze Vulkan and OpenGL ES applications at the system, frame, and draw-call levels to uncover GPU and CPU bottlenecks. AGI captures detailed performance counters, timelines, and pipeline state to reveal stalls, overdraw, shader hotspots, and inefficient resource usage. Its frame debugger lets you step through commands, inspect render targets and textures, review shaders, and experiment with pipeline changes to validate optimizations. Beyond per-frame analysis, AGI correlates GPU activity with CPU threads and system events to diagnose contention, scheduling issues, and thermal or power constraints. The tool is designed for reproducible performance investigations, making it easier to iterate, compare captures, and ship smoother, more efficient Android graphics experiences. -
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AWS Secrets Manager Java caching client
Enables in-process caching of secrets for Java applications
The AWS Secrets Manager Java caching client enables in-process caching of secrets for Java applications. To use this client you must have a Java 8 development environment. If you do not have one, go to Java SE Downloads on the Oracle website, then download and install the Java SE Development Kit (JDK). Java 8 or higher is recommended. An Amazon Web Services (AWS) account to access secrets stored in AWS Secrets Manager and use AWS SDK for Java. To create an AWS account, go to Sign In or Create an AWS Account and then choose I am a new user. Follow the instructions to create an AWS account. To create a secret in AWS Secrets Manager, go to Creating Secrets and follow the instructions on that page. To download and install the AWS SDK for Java, go to Installing the AWS SDK for Java in the AWS SDK for Java documentation and then follow the instructions on that page. -
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AWS X-Ray SDK for Java
The official AWS X-Ray Recorder SDK for Java
AWS X-Ray recommends using AWS Distro for OpenTelemetry (ADOT) to instrument your application instead of this X-Ray SDK due to its wider range of features and instrumentations. The AWS X-Ray SDK for Java is compatible with Java 8 and 11. Applications may make downstream HTTP calls to communicate with other applications. If these downstream applications are also traced, trace context information will need to be passed so that the trace segments may be properly grouped into a single trace. It may be useful to further decorate portions of an application for which performance is critical. Generating subsegments around these hot spots will help in understanding their impact on application performance. There are a few different styles available for tracing custom methods.You can automatically inject your current Trace ID into logging statements if you use the Log4J or SLF4J logging frontends. -
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Agents-Flex
Agents-Flex is an elegant LLM Application Framework like LangChain
Agents-Flex includes a variety of network protocols for connecting LLMs, such as HTTP, SSE and WS. Its simple and flexible design allows developers to easily connect to various LLMs, including OpenAI, LLama, and other AI. Agents-Flex provides a rich set of development templates and Prompt Frameworks, including FEW-SHOT, CRISPE, BROKE, and ICIO. Developers can also customize their own unique prompt templates. Agents-Flex has a very flexible Function Calling component. It supports local method definitions, parsing, callbacks through LLMs, and executing local methods to obtain results. Agents-Flex offers Loader, Parser, and Splitter components for the Document. Each component has multiple implementations, making it easy to load data from the web, local files, databases, and various data types. -
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Alpakka Kafka
Alpakka is a Reactive Enterprise Integration library for Java
The Alpakka project is an open source initiative to implement stream-aware and reactive integration pipelines for Java and Scala. It is built on top of Akka Streams and has been designed from the ground up to understand streaming natively and provide a DSL for reactive and stream-oriented programming, with built-in support for backpressure. Akka Streams is a Reactive Stream and JDK 9+ java.util.concurrent.Flow-compliant implementation and therefore fully interoperable with other implementations. As Kafka’s client protocol negotiates the version to use with the Kafka broker, you may use a Kafka client version that is different than the Kafka broker’s version. -
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Amazon DocumentDB JDBC Driver
Amazon DocumentDB JDBC driver to connect from BI tools and execute SQL
The JDBC driver for the Amazon DocumentDB managed document database provides an SQL-relational interface for developers and BI tool users. The Amazon DocumentDB JDBC driver can perform automatic schema discovery and generate an SQL to DocumentDB schema mapping. See the schema discovery documentation for more details of this process. Follow the requirements and setup directions to get you environment ready to use the Amazon DocumentDB JDBC driver. Assuming your Amazon DocumentDB cluster is hosted in a private VPC, you'll want to create an SSH tunnel to bridge to your cluster in the VPC. If you're a Tableau or other BI user, follow the directions on how to setup and use BI tools with the driver. The Amazon DocumentDB JDBC driver can perform automatic schema discovery and generate an SQL to DocumentDB schema mapping. -
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Android Network Tools
Set of useful android network tools
Disappointed by the lack of good network apps in android/java I developed a collection of handy networking tools for everyday Android development. The javadoc should provide all information needed to understand the methods. The sample app is published on Google Play & F-Droid to allow you to quickly and easier test the library. Enjoy! And please do feedback to us if your tests produce different results. -
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AndroidTVLauncher
This is a leanback style tv launcher(minSdkVersion 17)
This is a tv launcher, including a leanback launcher(minSdkVersion 17). CatLauncher (Leanback style) function has been basically stable at present, the progress of the follow-up will follow up with the official Leanback library. -
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Apache Druid
A high performance real-time analytics database
Druid is designed for workflows where fast ad-hoc analytics, instant data visibility, or supporting high concurrency is important. As such, Druid is often used to power UIs where an interactive, consistent user experience is desired. Druid streams data from message buses such as Kafka, and Amazon Kinesis, and batch load files from data lakes such as HDFS, and Amazon S3. Druid supports most popular file formats for structured and semi-structured data. Druid has been benchmarked to greatly outperform legacy solutions. Druid combines novel storage ideas, indexing structures, and both exact and approximate queries to return most results in under a second. Druid unlocks new types of queries and workflows for clickstream, APM, supply chain, network telemetry, digital marketing, risk/fraud, and many other types of data. Druid is purpose built for rapid, ad-hoc queries on both real-time and historical data. -
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Apache Flink
Stream processing framework with powerful stream
Apache Flink is a distributed engine for stateful computations over data streams and batches, designed for low-latency processing at scale. Its core runtime executes dataflow graphs with fine-grained backpressure and checkpointing, allowing applications to recover consistently from failures. Flink’s event-time model and watermarks enable accurate out-of-order processing, windowing, and complex time semantics that typical real-time systems struggle with. Developers program against high-level APIs—DataStream and Table/SQL—to express transformations, joins, and stateful patterns, while specialized libraries support CEP, machine learning workflows, and connectors. A rich connector ecosystem integrates with systems like Kafka, Kinesis, filesystems, JDBC sources/sinks, and object stores. Deployments span Kubernetes, YARN, Mesos, and standalone clusters, and operational features such as savepoints, state backends, and metrics make long-running jobs manageable in production. -
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Apache Lucene
Apache Lucene open-source search software
The Apache Lucene™ project develops open-source search software. The project releases a core search library, named Lucene™ core, as well as PyLucene, a Python binding for Lucene. Lucene Core is a Java library providing powerful indexing and search features, as well as spellchecking, hit highlighting and advanced analysis/tokenization capabilities. The PyLucene sub-project provides Python bindings for Lucene Core. The Apache Software Foundation provides support for the Apache community of open-source software projects. The Apache projects are defined by collaborative consensus-based processes, an open, pragmatic software license and a desire to create high-quality software that leads the way in its field. Apache Lucene, Apache Solr, Apache PyLucene, Apache Open Relevance Project and their respective logos are trademarks of The Apache Software Foundation. -
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Apache SkyWalking
Application Performance Monitoring System
Apache SkyWalking is an open source application performance monitoring system designed specifically for microservices, as well as cloud-native and container-based(Docker, Mesos, Kubernetes) architectures. It is capable of monitoring, tracing and diagnosing distributed systems in cloud native architectures. Apache Skywalking supports the collection of telemetry data from a number of different sources and in different formats, such as Java, .NET Core, PHP, LUA agent and more. It also offers a solid core features set, which includes root cause analysis, service topology map analysis, performance optimization, and many more. -
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Applied Energistics 2
A Minecraft Mod about Matter and Energy
Applied Energistics 2 (AE2) is a comprehensive mod for Minecraft that introduces a unique approach to in-game inventory management. Its theme is centered around the concept of converting matter into energy and vice versa, to store and transport your items and fluids instantaneously. AE2 revolutionizes storage in Minecraft. The mod adds a network-based digital storage system, where items and blocks are stored as energy in a digital form within a network of connected devices. This allows for compact storage solutions and easy access to your items. Another significant feature of AE2 is its automatic crafting capabilities. Players can set up patterns and recipes which the system can automatically craft on demand. This greatly streamlines bulk and complex crafting processes, saving time and effort. AE2 adds a whole new level of strategy to your Minecraft builds with its networking and channel system. -
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Auto-Parcel
Android Parcelable models made easy
Auto‑Parcel is a Google AutoValue extension for Android that auto-generates Parcelable implementations. By annotating classes with @AutoValue and implements Parcelable, it automatically constructs boilerplate for serialization, equals(), hashCode(), and toString(). It integrates with Gradle annotation processing, streamlining Android model class creation. -
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BottomDialogs
An Android library that shows a customizable Material-based bottom
Android Library that shows a customizable Material-based bottom sheet. -
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CDC Connectors for Apache Flink
CDC Connectors for Apache Flink
This project provides a set of source connectors for Apache Flink® directly ingesting changes coming from different databases using Change Data Capture(CDC). CDC Connectors for Apache Flink® is a set of source connectors for Apache Flink®, ingesting changes from different databases using change data capture (CDC). CDC Connectors for Apache Flink® integrates Debezium as the engine to capture data changes. So it can fully leverage the ability of Debezium. Supports reading database snapshot and continues to read transaction logs with exactly-once processing even failures happen. CDC connectors for DataStream API, users can consume changes on multiple databases and tables in a single job without Debezium and Kafka deployed. CDC connectors for Table/SQL API, users can use SQL DDL to create a CDC source to monitor changes on a single table. CDC Connectors for Apache Flink® supports ingesting snapshot data and real time changes from databases to Flink®. -
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COLA
Clean object-oriented & layered architecture
COLA is the abbreviation of Clean Object-Oriented and Layered Architecture, which stands for "Clean Object-Oriented and Layered Architecture." At present, COLA has developed to COLA 4.0. COLA is divided into two parts, COLA architecture and COLA components. The meaning of architecture is the structure of elements. The COLA architecture was born for this purpose, and its core responsibility is to define a good application structure and provide the best practice of the best application architecture. Through continuous exploration, we found that a good hierarchical structure and a good package structure definition can help us manage the chaotic business application system. After many iterations, we have defined a relatively stable and reliable application architecture. Good application architectures all follow some common patterns. -
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Cicada
Fast lightweight HTTP service framework
Fast, lightweight Web framework based on Netty; without too much dependency, and the core jar package is only 30KB. Configuration files can also be read in multiple environments, just add VM parameters, also ensure that the parameter name and file name are consistent. -
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Codename One
Cross-platform framework for building truly native mobile apps
An open-source mobile-first toolkit for building high-quality, cross-platform native apps for Android, iOS, Desktop & Web. Rapid cross-platform app development using Java or Kotlin with 100% code reuse. Apps are compiled down to native code for maximum performance and a smooth user experience. Write, debug, and test apps all inside your IDE (IntelliJ, Eclipse, VSCode or NetBeans) using the Codename One simulator. One-click for app-store-ready device builds, without the headache of maintaining native SDKs. Build beautiful UI with Codename One’s rich set of widgets, specifically designed for mobile apps. Native look and feel out of the box, but fully themeable using CSS to provide your own unique look. Compiles Java or Kotlin into native code for iOS, UWP (Universal Windows Platform), Android and even JavaScript (with seamless PWA and Thread support) Changes you make in your Java/Kotlin source code will be applied immediately to your already-running app in the simulator. -
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CommaFeed
Google Reader inspired self-hosted RSS reader
Google Reader inspired self-hosted RSS reader, based on Dropwizard and React/TypeScript. -
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CrateDB
CrateDB is a distributed and scalable SQL database
CrateDB is a distributed SQL database designed for massive machine data and real-time analytics. It combines the scalability and performance of NoSQL with the power and simplicity of SQL, allowing for horizontal scaling, full-text search, and complex queries over large datasets. Built in Java and powered by Elasticsearch and Lucene, CrateDB is optimized for high-velocity data ingestion and dynamic queries. -
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DSA Bootcamp Java
This repository consists of the code samples, assignments, and notes
DSA Bootcamp Java is an open source educational repository created by Kunal Kushwaha to teach Data Structures and Algorithms (DSA) using Java. It is designed as a structured bootcamp, covering fundamental concepts to advanced problem-solving techniques. The project provides explanations, exercises, assignments, and practice problems, making it useful for both beginners and intermediate learners who want to strengthen their Java and algorithmic skills. The repository is organized into multiple modules that start with Java basics and gradually progress toward arrays, recursion, sorting, searching, linked lists, stacks, queues, trees, graphs, dynamic programming, and other advanced topics. It is a popular resource for students preparing for coding interviews, competitive programming, or computer science fundamentals. -
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Dagger
Containerized automation engine for programmable CI/CD workflows
Dagger is an open source automation engine designed to build, test, and deliver software in a consistent and programmable way. It enables developers to define software delivery workflows using code instead of complex shell scripts or configuration files. Dagger executes tasks inside containers, ensuring that automation runs in identical environments across local machines, CI servers, or cloud infrastructure. Dagger provides a core execution engine and system API that orchestrates containers, filesystems, secrets, repositories, and other resources needed during development pipelines. Developers can write pipelines using SDKs available for multiple programming languages, enabling integration with existing development stacks and tools. It focuses on repeatability and efficiency by running tasks incrementally and caching intermediate results so that only affected operations are re-executed when changes occur. -
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DiscordSRV
Discord bridging plugin for block game
A plugin that links Minecraft servers to Discord channels, providing chat synchronization and notifications between both platforms. -
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Droid Plugin
A plugin framework on android,Run any third-party apk
A plugin framework on android, Run any third-party apk without installation, modification, or repackage. This is a framework on android. You can run any third-party apk without installation, modification or repackage with Droid Plugin. Given its .apk file, the plugged app could be run either independently or as a plugin of the host, NO source code is needed. The plugged app are recognized as Installed by the host and other plugged apps. Very low level of code invasion, indeed just one line code to integrate DroidPlugin into the host app. Complete code level separation between host and plugged apps, only system-level message passing method provided by Android allowed. Resources management are also completely separated between host and plugged apps. Process management for plugged apps, idle processed of the plugged app will be timely recycled to guarantee minimum memory usage.
