Open Source Java Software - Page 20

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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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  • 1
    WipeFreeSpace

    WipeFreeSpace

    Secure wiping/shredding of free disk space with many methods

    WipeFreeSpace is a program to securely erase/wipe/overwrite/shred the free space on file systems WITHOUT DESTROYING EXISTING FILES, to prevent recovery of deleted sensitive data. This allows protecting the user's privacy when e.g. selling the drive or the whole computer. The following filesystems are supported: - Ext2/3/4, - NTFS, - XFS, - ReiserFSv3/4, - FAT12/16/32, - MinixFS1/2, - JFS, - HFS/HFS+, - OCFS. The following wiping methods are supported: Gutmann-like, random, Schneier, DoD. Additionally, WipeFreeSpace can finalize wiping the filesystem by writing blocks of zeros, which is friendly for sparse files, virtual systems and other places where zeroed-out space is not physically allocated. See the project homepage https://wipefreespace.sourceforge.io and the project Wiki in the menu above. To prevent clear-text data from being left on the drive in the first place, you can use LibSecRm (https://libsecrm.sourceforge.io), which wipes the data on-the-fly.
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    Downloads: 91 This Week
    Last Update:
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  • 2
    Digital space for building and confronting interpretations about documents
    Downloads: 163 This Week
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  • 3
    Canal

    Canal

    MySQL binlog

    Canal is an open-source project developed by Alibaba that simulates MySQL slave functionality to parse MySQL binlog files. It enables real-time data synchronization and change data capture (CDC) between MySQL and other systems such as Elasticsearch, Kafka, or HBase. Canal is widely used for data integration, replication, and monitoring across distributed systems, offering high performance and low-latency log parsing.
    Downloads: 6 This Week
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  • 4
    Codename One

    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.
    Downloads: 6 This Week
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  • 5
    CrateDB

    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.
    Downloads: 6 This Week
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  • 6
    Discourse Network Analyzer (DNA)

    Discourse Network Analyzer (DNA)

    Discourse Network Analyzer (DNA)

    The Java software Discourse Network Analyzer (DNA) is a qualitative content analysis tool with network export facilities. You import text files and annotate statements that persons or organizations make, and the program will return network matrices of actors connected by shared concepts.
    Downloads: 6 This Week
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  • 7
    Etar Calendar

    Etar Calendar

    Android open source calendar

    Etar is an open-source material-designed calendar made for everyone.
    Downloads: 6 This Week
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  • 8
    GRASSMARLIN

    GRASSMARLIN

    Provides situational awareness of Industrial Control Systems (ICS)

    GRASSMARLIN provides IP network situational awareness of industrial control systems (ICS) and Supervisory Control and Data Acquisition (SCADA) networks to support network security. Passively map, and visually display, an ICS/SCADA network topology while safely conducting device discovery, accounting, and reporting on these critical cyber-physical systems.
    Downloads: 6 This Week
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  • 9
    Ghidra MCP

    Ghidra MCP

    Socket based MCP Server for Ghidra

    GhidraMCP is a Ghidra plugin implementing the Model Context Protocol, bridging Ghidra's reverse engineering capabilities with AI assistants to enhance binary analysis tasks. ​
    Downloads: 6 This Week
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  • 10
    Gitember 2

    Gitember 2

    Gitember another git GUI client written on javafx

    November, December, Gitember. Just another GIT gui client just for fun. Full-text search across history, including binary files. Search in open files. Add change annotation, and branch differences with item details. Add an overview for different components. Added LFS support. With SSH only. Fast file compare, the text flow changed to rich text fx. Mass operations - delete, stage, unstage, and revert.
    Downloads: 6 This Week
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  • 11
    Halo

    Halo

    Open-source blogging and content management system

    Halo is a modern, powerful open-source blogging and content management system built with Java and Spring Boot. It is designed to be flexible, lightweight, and easy to deploy. Halo supports theming, markdown editing, multi-user roles, scheduled publishing, and a plugin architecture. With a responsive admin dashboard and RESTful APIs, Halo caters to developers and content creators who need a customizable self-hosted CMS alternative.
    Downloads: 6 This Week
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  • 12
    Haven

    Haven

    Protect personal spaces and possessions without compromising privacy

    Haven is for people who need a way to protect their personal spaces and possessions without compromising their own privacy, through an Android app and on-device sensors. Haven is for people who need a way to protect their personal areas and possessions without compromising their privacy. It is an Android application that leverages on-device sensors to provide monitoring and protection of physical areas. Haven turns any Android phone into a motion, sound, vibration and light detector, watching for unexpected guests and unwanted intruders. We designed Haven for investigative journalists, human rights defenders and people at risk of forced disappearance to create a new kind of herd immunity. By combining the array of sensors found in any smartphone, with the world’s most secure communications technologies, like Signal and Tor, Haven prevents the worst kind of people from silencing citizens without getting caught in the act.
    Downloads: 6 This Week
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  • 13
    Hello Algorithm

    Hello Algorithm

    Animated illustrations, one-click data structure

    Animated illustrations, one-click data structure and algorithm tutorials. This project aims to create an open source, free, novice-friendly introductory tutorial on data structures and algorithms. The whole book uses animated illustrations, the content is clear and easy to understand, and the learning curve is smooth, guiding beginners to explore the knowledge map of data structures and algorithms. The source code can be run with one click, helping readers improve their programming skills during exercises and understand the working principles of algorithms and the underlying implementation of data structures. Readers are encouraged to help each other learn, and questions and comments can usually be answered within two days.
    Downloads: 6 This Week
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  • 14
    Jailer Database Tool

    Jailer Database Tool

    Database subsetting and relational data browsing tool

    Jailer is a tool for database subsetting, schema and data browsing. It creates small slices from your database and lets you navigate through your database following the relationships. Ideal for creating small samples of test data or for local problem analysis with relevant production data. Creates small slices from your productive database and imports the data into your development and test environment (consistent and referentially intact). Improves database performance by removing and archiving obsolete data without violating integrity. The Data Browser lets you navigate through your database following the relationships (foreign key-based or user-defined) between tables. Generates SQL (topologically sorted), XML (hierarchically structured) and DbUnit datasets. A demo database is included with which you can get a first impression without any configuration effort.
    Downloads: 6 This Week
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  • 15
    Kafdrop

    Kafdrop

    Kafka Web UI

    Kafdrop is a web UI for viewing Kafka topics and browsing consumer groups. The tool displays information such as brokers, topics, partitions, and consumers, and lets you view messages. This project is a reboot of Kafdrop 2.x, dragged kicking and screaming into the world of Java 17+, Kafka 2.x, Helm and Kubernetes. It's a lightweight application that runs on Spring Boot and is dead-easy to configure, supporting SASL and TLS-secured brokers.
    Downloads: 6 This Week
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  • 16
    Lombok

    Lombok

    New additions to the Java programming language

    Project Lombok is a java library that automatically plugs into your editor and build tools, spicing up your java. Never write another getter or equals method again, with one annotation your class has a fully featured builder, Automate your logging variables, and much more. Project Lombok is available as a single jar file on the project site. It includes the APIs for development as an installer for IDE integration. On most systems, simply double-clicking the jar file will launch the installer. The installer will attempt to detect the location of a supported IDE. If it cannot correctly determine where the IDE is installed, the location can be specified manually. Simply click "Install/Update," and IDE integration is complete. There are a number of annotations in Project Lombok to allow for more fine grained control over the structure and behavior of a class.
    Downloads: 6 This Week
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  • 17
    Mixin

    Mixin

    Mixin is a trait/mixin and bytecode weaving framework for Java

    Mixin is a trait/mixin framework for Java using ASM and hooking into the runtime classloading process via a set of pluggable built-in or user-provided services. Built-in services currently support Mojang's LegacyLauncher system, though this is deprecated in favor of ModLauncher by cpw, which has greater extensibility and has support for Java 8 and later. Additional documentation for individual features and annotations can be found in the extensive Javadoc. For additional help use the channel #mixin on the Sponge Discord Server. For handling obfuscation tasks, Mixin provides an Annotation Processor which works at compile time to generate obfuscation mappings for your toolchain to apply. If using Gradle 5 or later, annotation processors are no longer automatically loaded from compile configurations and must be specified explicitly via annotationProcessor configurations.
    Downloads: 6 This Week
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  • 18
    Netty

    Netty

    An event-driven asynchronous network application framework

    Netty is an asynchronous, event-driven networking framework for the JVM that simplifies building high-performance clients and servers. It wraps Java NIO with a channel/handler pipeline model, enabling clean composition of codecs, TLS, and application logic with minimal overhead. Its ByteBuf abstractions, buffer pooling, and zero-copy techniques help reduce GC pressure and improve throughput under heavy I/O. Support for common protocols—HTTP/1.1, HTTP/2, WebSocket, and raw TCP/UDP—makes it a foundation for RPC frameworks, proxies, and messaging systems. Pluggable transports and native integrations (like epoll or kqueue where available) allow fine-tuning for different operating systems. With robust resource management, leak detection, and extensive testing, Netty is widely chosen when low latency, scalability, and control over the I/O stack are required.
    Downloads: 6 This Week
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  • 19
    Nextcloud Android app

    Nextcloud Android app

    The Android client for Nextcloud

    Nextcloud Android app is the Android client for Nextcloud, a private file sync & share and communication server. It lets you access all of your files easily on your Nextcloud from any Android device. Nextcloud Android app is easy to use and completely open source, so you can host it yourself or have a company do it for you. Always stay in control of your photos, calendar, contact data and other documents and files with Nextcloud.
    Downloads: 6 This Week
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  • 20
    Omni-Notes

    Omni-Notes

    Free and powerful note-taking application

    Omni-Notes is a powerful open-source note-taking application for Android designed to be both smart and simple. It has a clean and simple Material Design interface and is packed with plenty of smart features. These include image, audio and generic file attachment, a To-do list, Google Now integration, numerous widgets and so much more. Omni-Notes takes note-taking to a whole new level, making it more convenient and integrated. It's an ideal note-taking application particularly for old Android phones without such apps, giving users an updated look and experience when taking down notes.
    Downloads: 6 This Week
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  • 21
    OpenBot

    OpenBot

    OpenBot leverages smartphones as brains for low-cost robots

    OpenBot leverages smartphones as brains for low-cost robots. We have designed a small electric vehicle that costs about $50 and serves as a robot body. Our software stack for Android smartphones supports advanced robotics workloads such as person following and real-time autonomous navigation. Current robots are either expensive or make significant compromises on sensory richness, computational power, and communication capabilities. We propose to leverage smartphones to equip robots with extensive sensor suites, powerful computational abilities, state-of-the-art communication channels, and access to a thriving software ecosystem. We design a small electric vehicle that costs $50 and serves as a robot body for standard Android smartphones. We develop a software stack that allows smartphones to use this body for mobile operation and demonstrate that the system is sufficiently powerful to support advanced robotics workloads such as person following and real-time autonomous navigation.
    Downloads: 6 This Week
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  • 22
    OpenRefine

    OpenRefine

    A free, open source, powerful tool for working with messy data

    OpenRefine is a powerful Java-based tool designed to work with messy data and improve it. With OpenRefine you can load data, understand it, clean it up, transform it, reconcile it, and augment it with web services and external data. It allows you to do this all from a web browser and in the convenience and privacy of your own computer. OpenRefine keeps all data securely in your computer by running a small server on it, using your web browser to interact with it. When you're ready, then that is the only time the data will be shared outside of your computer. OpenRefine is available in over 15 languages, is cross-platform and part of the Code for Science & Society.
    Downloads: 6 This Week
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  • 23
    OpenRocket

    OpenRocket

    Model-rocketry aerodynamics and trajectory simulation software

    OpenRocket is a free and fully featured simulation software for designing, analyzing, and optimizing model rockets before physical construction and launch. It provides a comprehensive environment where users can assemble rocket components, visualize designs in both 2D and 3D, and simulate flight behavior using accurate aerodynamic and physics models. The software incorporates six-degree-of-freedom flight simulation, allowing it to model real-world dynamics such as stability, drag, thrust, and staging effects. Users can analyze simulation outputs like altitude, velocity, and acceleration through detailed plots, enabling iterative improvements to rocket designs. OpenRocket also supports exporting designs for manufacturing processes such as 3D printing or laser cutting, bridging the gap between simulation and real-world prototyping.
    Downloads: 6 This Week
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  • 24
    Playwright for Java

    Playwright for Java

    Java version of the Playwright testing and automation library

    Playwright Java is the Java version of the Playwright testing and automation library, enabling reliable end-to-end testing for modern web applications.
    Downloads: 6 This Week
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  • 25
    Spoon

    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: 6 This Week
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