Showing 544 open source projects for "core java"

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  • The AI workplace management platform Icon
    The AI workplace management platform

    Plan smart spaces, connect teams, manage assets, and get insights with the leading AI-powered operating system for the built world.

    By combining AI workflows, predictive intelligence, and automated insights, OfficeSpace gives leaders a complete view of how their spaces are used and how people work. Facilities, IT, HR, and Real Estate teams use OfficeSpace to optimize space utilization, enhance employee experience, and reduce portfolio costs with precision.
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  • SoftCo: Enterprise Invoice and P2P Automation Software Icon
    SoftCo: Enterprise Invoice and P2P Automation Software

    For companies that process over 20,000 invoices per year

    SoftCo Accounts Payable Automation processes all PO and non-PO supplier invoices electronically from capture and matching through to invoice approval and query management. SoftCoAP delivers unparalleled touchless automation by embedding AI across matching, coding, routing, and exception handling to minimize the number of supplier invoices requiring manual intervention. The result is 89% processing savings, supported by a context-aware AI Assistant that helps users understand exceptions, answer questions, and take the right action faster.
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  • 1
    iText

    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.
    Downloads: 30 This Week
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  • 2
    Apache SkyWalking

    Apache SkyWalking

    Application Performance Monitoring System

    ...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.
    Downloads: 2 This Week
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  • 3
    JavaGuide

    JavaGuide

    "Java Learning + Interview Guide" covers the core Java knowledge

    ...The repository also includes sections on computer science basics such as operating systems, networks, and data structures, along with practical guides for databases, Redis, MySQL, and MongoDB. Beyond core Java, JavaGuide covers tools like Maven, Docker, Git, and frameworks like Spring, Spring Boot, and MyBatis. Its structured approach makes it a comprehensive handbook for both beginners and experienced backend engineers.
    Downloads: 0 This Week
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  • 4
    OpenNMS

    OpenNMS

    Enterprise-Grade Open-Source Network Management Platform

    OpenNMS is an open-source network monitoring platform that helps you visualize and monitor everything on your local and distributed networks. OpenNMS offers comprehensive fault, performance, and traffic monitoring with alarm generation in one place. Highly customizable and scalable, OpenNMS integrates with your core business applications and workflows.
    Downloads: 5 This Week
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  • Run applications fast and securely in a fully managed environment Icon
    Run applications fast and securely in a fully managed environment

    Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

    Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.
    Try for free
  • 5
    Vavr

    Vavr

    Object-functional library that runs with Java 8+

    Vavr core is a functional library for Java. It helps to reduce the amount of code and to increase the robustness. A first step towards functional programming is to start thinking in immutable values. Vavr provides immutable collections and the necessary functions and control structures to operate on these values. The results are beautiful and just work.
    Downloads: 2 This Week
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  • 6
    JSON Schema Validator

    JSON Schema Validator

    A fast Java JSON schema validator that supports draft V4, V6, V7, V201

    This is a Java implementation of the JSON Schema Core Draft v4, v6, v7, v2019-09 and v2020-12(partial) specification for JSON schema validation. In addition, it also works for OpenAPI 3.0 request/response validation with some configuration flags. For users who want to collect information from a JSON node based on the schema, the walkers can help.
    Downloads: 14 This Week
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  • 7
    OSHI

    OSHI

    Native Operating System and Hardware Information

    OSHI is a free JNA-based (native) Operating System and Hardware Information library for Java. It does not require the installation of any additional native libraries and aims to provide a cross-platform implementation to retrieve system information, such as OS version, processes, memory and CPU usage, disks and partitions, devices, sensors, etc.
    Downloads: 9 This Week
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  • 8
    bitcoinj

    bitcoinj

    A library for working with Bitcoin

    bitcoinj is a library for working with the Bitcoin protocol. It can maintain a wallet, send/receive transactions without needing a local copy of Bitcoin Core and has many other advanced features. It's implemented in Java but can be used from any JVM compatible language, examples in Python and JavaScript are included. Highly optimized lightweight simplified payment verification (SPV) mode. In this mode, only a small part of the blockchain is downloaded, making bitcoin suitable for usage on constrained devices like smartphones or cheap virtual private servers. ...
    Downloads: 5 This Week
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  • 9
    Radiance libraries

    Radiance libraries

    Building modern, elegant and fast Swing applications

    Radiance is a collection of libraries for writing modern, elegant and fast Swing applications based on the Ephemeral design system. It is built with Java 9, and runs on Java 9 and later. Common provides APIs to work with images and text that scale with the display resolution. Radiance icons scale to maintain crisp, pixel-perfect visuals for application icons. Font APIs can be used to render platform-consistent textual content across a variety of supported platforms. Animation provides powerful and flexible animation APIs that scale from simple, single-property cases to complex scenarios that involve multiple animations. ...
    Downloads: 0 This Week
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  • The full-stack observability platform that protects your dataLayer, tags and conversion data Icon
    The full-stack observability platform that protects your dataLayer, tags and conversion data

    Stop losing revenue to bad data today. and protect your marketing data with Code-Cube.io.

    Code-Cube.io detects issues instantly, alerts you in real time and helps you resolve them fast. No manual QA. No unreliable data. Just data you can trust and act on.
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  • 10
    Joda-Time

    Joda-Time

    Replacement for the Java date and time classes prior to Java SE 8

    The standard date and time classes prior to Java SE 8 are poor. By tackling this problem head-on, Joda-Time became the de facto standard date and time library for Java prior to Java SE 8. Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project. The design allows for multiple calendar systems, while still providing a simple API.
    Downloads: 7 This Week
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  • 11
    ZAP

    ZAP

    The OWASP ZAP core project

    The OWASP Zed Attack Proxy (ZAP) is one of the world’s most popular free security tools and is actively maintained by a dedicated international team of volunteers. It can help you automatically find security vulnerabilities in your web applications while you are developing and testing your applications. It's also a great tool for experienced pentesters to use for manual security testing. ZAP is an easy to use integrated penetration testing tool for finding vulnerabilities in web...
    Downloads: 137 This Week
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  • 12
    Open-Source auth provider

    Open-Source auth provider

    Open source alternative to Auth0 / Firebase Auth, etc.

    Add secure login and session management to your apps. SDKs available for popular languages and front-end frameworks e.g. Node.js, Go, Python, React.js, React Native, Vanilla JS, etc. Supertokens architecture is optimized to add secure authentication for your users without compromising on user and developer experience. Frontend SDK: Manages session tokens and renders login UI widgets. Backend SDK: Provides APIs for sign-up, sign-in, signout, session refreshing etc. Your Frontend will talk to...
    Downloads: 3 This Week
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  • 13
    Liquibase

    Liquibase

    Main Liquibase Source

    Liquibase Community is an open source project that helps millions of developers rapidly manage database schema changes. Liquibase helps millions of teams track, version, and deploy database schema changes. Control database schema changes for specific versions. Eliminate errors and delays when releasing databases. Automatically order scripts for deployment. Easily rollback changes. Collaborate with tools you already use. Liquibase Core works with the following databases: Apache Derby,...
    Downloads: 33 This Week
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  • 14
    GeoServer

    GeoServer

    GeoServer repository

    ...GeoServer forms a core component of the Geospatial Web.
    Downloads: 18 This Week
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  • 15
    Minestom

    Minestom

    1.21.11 Lightweight Minecraft server

    Minestom is an open-source Minecraft server development framework that allows developers to build custom Minecraft server software from scratch without relying on Mojang’s original server code. Instead of functioning as a traditional server implementation, Minestom acts as a lightweight library that provides the core networking and gameplay infrastructure needed to create Minecraft server applications. Developers can use it to design custom game modes, experimental server architectures, or entirely new gameplay systems while maintaining compatibility with the Minecraft Java Edition client. The framework focuses on performance, modularity, and extensibility, allowing developers to include only the features required for their specific server projects. ...
    Downloads: 10 This Week
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  • 16
    Angel

    Angel

    A Flexible and Powerful Parameter Server for large-scale ML

    ...Angel is jointly developed by Tencent and Peking University, taking account of both high availability in industry and innovation in academia. With a model-centered core design concept, Angel partitions the parameters of complex models into multiple parameter-server nodes and implements a variety of machine learning algorithms and graph algorithms using efficient model-updating interfaces and functions, as well as a flexible consistency model for synchronization. Angel is developed with Java and Scala. ...
    Downloads: 4 This Week
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  • 17
    X's Recommendation Algorithm

    X's Recommendation Algorithm

    Source code for the X Recommendation Algorithm

    The Algorithm is Twitter’s open source release of the core ranking system that powers the platform’s home timeline. It provides transparency into how tweets are selected, prioritized, and surfaced to users, reflecting Twitter’s move toward openness in recommendation algorithms. The repository contains the recommendation pipeline, which incorporates signals such as engagement, relevance, and content features, and demonstrates how they combine to form ranked outputs. Written primarily in...
    Downloads: 1 This Week
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  • 18
    Chronicle Wire

    Chronicle Wire

    Low Garbage Java Serialisation Library that supports multiple formats

    Chronicle Wire is a Wire Format abstraction library. Chronicle Wire uses Chronicle Bytes for bytes manipulation, and Chronicle Core for low-level JVM access. Configuration includes aliased type information. This supports easy extension by adding new classes/versions, and cross-platform using type aliasing. By supporting types, a configuration file can bootstrap itself. You control how the configuration file is decoded. See example Queue Enterprise config. To send the configuration of a...
    Downloads: 0 This Week
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  • 19
    SCI

    SCI

    Configurable Clojure/Script interpreter suitable for scripting

    SCI is a lightweight Clojure interpreter designed for embedding and scripting in JVM or native apps (e.g., Babashka). It supports stateful contexts, multiple evaluations, and a configurable environment without full JVM startup overhead. Packed with optional extensions (like reagent, js-interop), it enables REPL-like interactivity in minimal environments.
    Downloads: 2 This Week
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  • 20
    Spring Data Neo4j

    Spring Data Neo4j

    Provide support to increase developer productivity in Java

    Spring Data Neo4j, part of the larger Spring Data family, provides easy configuration and access to Neo4j Graph Databases from Spring applications. It offers three different levels of abstraction to access the store. The Neo4j client, the Neo4j Template, and the Neo4j Repositories. Spring Data Neo4j offers advanced features to map annotated entity classes to the Neo4j Graph Database. The template programming model is equivalent to other Spring templates and builds the basis for interaction...
    Downloads: 5 This Week
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  • 21
    capacitor

    capacitor

    Build cross-platform native progressive web apps for iOS and Android

    Capacitor is an open source native runtime for building Web Native apps. Create cross-platform iOS, Android, and Progressive Web Apps with JavaScript, HTML, and CSS. Capacitor’s native plugin APIs make it extremely easy to access and invoke common device functionality across multiple platforms. Build web-based applications that run equally well across iOS, Android, and as Progressive Web Apps. Access the full Native SDKs on each platform, and easily deploy to the App Stores (and the web)....
    Downloads: 39 This Week
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  • 22
    Apache Iceberg

    Apache Iceberg

    Apache Iceberg

    ...The spec is currently evolving as the Java reference implementation changes.
    Downloads: 3 This Week
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  • 23
    Stanford CoreNLP

    Stanford CoreNLP

    Stanford CoreNLP, a Java suite of core NLP tools

    CoreNLP is your one stop shop for natural language processing in Java! CoreNLP enables users to derive linguistic annotations for text, including token and sentence boundaries, parts of speech, named entities, numeric and time values, dependency and constituency parses, coreference, sentiment, quote attributions, and relations. CoreNLP currently supports 6 languages, Arabic, Chinese, English, French, German, and Spanish. The centerpiece of CoreNLP is the pipeline. Pipelines take in raw text,...
    Downloads: 4 This Week
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  • 24
    Source Code Hunter

    Source Code Hunter

    Source code analysis of Spring, MyBatis, Redis, Netty, and more

    Source Code Hunter is an open source project by Doocs that focuses on analyzing and explaining the source code of widely used Java frameworks and libraries. It helps developers deepen their understanding of internal implementations, design patterns, and performance optimizations by walking through actual codebases such as Spring, MyBatis, Netty, Tomcat, and others. The project aims to bridge the gap between theoretical knowledge and real-world application by providing step-by-step annotated explorations of core components in these frameworks. ...
    Downloads: 1 This Week
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  • 25
    RStudio

    RStudio

    RStudio is an integrated development environment (IDE) for R

    RStudio is a powerful, full-featured integrated development environment (IDE) tailored primarily for the R programming language but increasingly supportive of other languages like Python and Julia. It brings together console, editor, plotting, workspace, history, and file-management panes into a unified interface, helping data scientists, statisticians, and analysts to work more productively. The IDE is cross-platform: there are desktop versions for Windows, macOS and Linux, as well as a...
    Downloads: 43 This Week
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