Open Source Java System Software - Page 9
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Java System Software
View 1993 business solutionsBrowse free open source Java System Software and projects below. Use the toggles on the left to filter open source Java System Software by OS, license, language, programming language, and project status.
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Stop Cyber Threats with VM-Series Next-Gen Firewall on AzureGain integrated visibility across all traffic in a single pass. Deploy Palo Alto Networks VM-Series to determine application identity and content while automating security policy updates via rich APIs.
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Stop Storing Third-Party Tokens in Your DatabaseRolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
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Coffee GB
Gameboy emulator in Java 8
Coffee GB is a Gameboy Color emulator written in Java 8. It's meant to be a development exercise. More info can be found in the blog post. First I implemented all the Gameboy CPU opcodes. It’s not exactly the Z80, but it’s pretty close. As a reference, I’ve used the GameBoy CPU Manual - later on I discovered that it has a few typos and is not specific enough for some of the operations. After implementing the opcodes and memory (modelled by an int[] array) I was eager to check whether it’s possible to run some code on it. I had neither the cartridge nor the GPU emulation yet, so even the simplest game wouldn’t be an option. However, when the original Gameboy starts, it executes a simple 256-bytes program, a kind of firmware displaying the Nintendo logo and self-testing the system. That was exactly the thing I was looking for - after just 3 days I had an application running the Gameboy code! -
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ElAdmin
Backend management system based on Spring Boot
Eladmin is a modular, full-featured backend management system based on Spring Boot, Spring Security, JWT, and Vue.js. It provides a front-end and back-end separation architecture suitable for enterprise-level projects and includes functionality like user and role management, logging, code generation, and monitoring. Eladmin is designed for quick deployment of admin systems and offers a robust base for building custom applications with authentication, authorization, and responsive UI components. -
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Fast Android Networking
A Complete Fast Android Networking Library that also supports HTTP/2
Fast Android Networking Library is a powerful library for doing any type of networking in Android applications which is made on top of OkHttp Networking Layer. Fast Android Networking Library takes care of each and everything. So you don't have to do anything, just make a request and listen for the response. The recent removal of HttpClient in Android Marshmallow(Android M) made other networking libraries obsolete. No other single library does and everything like making requests, downloading any type of file, uploading file, loading images from the network in ImageView, etc. There are some libraries but they are outdated. No other library provides a simple interface for doing all types of things in networking like setting priority, canceling, etc. As it uses Okio , No more GC overhead in android applications. Okio is made to handle GC overhead while allocating memory. Okio does some clever things to save CPU and memory. -
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Fiery
trace for PHP
Fiery is an APM-Application Performance Management for the PHP. -
Enterprise-grade ITSM, for every businessFreshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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JetLinks
JetLinks is developed based on Java, Spring Boot, WebFlux, Netty
JetLinks Community is an open-source enterprise IoT platform built with Java, Spring Boot, WebFlux, Netty, Vert.x, Reactor, and related reactive technologies. It is designed to help teams quickly build IoT business systems without starting from a blank backend. The platform supports unified device modeling, unified device access, and centralized management across different device types, vendors, and communication protocols. It can connect devices through TCP, UDP, MQTT, HTTP, TLS, DTLS, and other protocol patterns while hiding much of the complexity of network programming. JetLinks also includes real-time data processing, device alerts, message notifications, data forwarding, geographic features, visualization, and a configurable rule engine. It is best suited for companies that need a customizable IoT foundation for device management, telemetry, automation, and industrial or enterprise monitoring. -
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Micrometer
App observability facade for the most popular observability tools
Micrometer provides a simple facade over the instrumentation clients for the most popular observability systems, allowing you to instrument your JVM-based application code without vendor lock-in. Think SLF4J, but for observability. Micrometer provides vendor-neutral interfaces for timers, gauges, counters, distribution summaries, and long task timers with a dimensional data model that, when paired with a dimensional monitoring system, allows for efficient access to a particular named metric with the ability to drill down across its dimensions. Out-of-the-box instrumentation of caches, the class loader, garbage collection, processor utilization, thread pools, and more tailored to actionable insight. Micrometer is the instrumentation library powering the delivery of application observability from Spring Boot applications. -
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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. -
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ThingsBoard Message Queue (TBMQ)
Open-source, scalable, and fault-tolerant MQTT broker
TBMQ is a lightweight message broker built to support ThingsBoard's IoT platform, focusing on telemetry data streaming and device communication. It uses Kafka-compatible APIs and is optimized for high-throughput messaging, device scalability, and low-latency delivery. TBMQ is ideal for IoT backends needing MQTT or Kafka-style pub/sub infrastructure. -
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WireMock
A tool for mocking HTTP services
HTTP response stubbing, matchable on URL, header and body content patterns. Request verification, runs in unit tests, as a standalone process or as a WAR app. Configurable via a fluent Java API, JSON files and JSON over HTTP. Record/playback of stubs, fault injection, per-request conditional proxying, browser proxying for request inspection and replacement. Stateful behavior simulation and configurable response delays. Mock your APIs for fast, robust and comprehensive testing. WireMock is a simulator for HTTP-based APIs. Some might consider it a service virtualization tool or a mock server. It enables you to stay productive when an API you depend on doesn't exist or isn't complete. It supports testing of edge cases and failure modes that the real API won't reliably produce. And because it's fast it can reduce your build time from hours down to minutes. -
Full-stack observability with actually useful AI | Grafana CloudBuilt on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
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Zuul
Gateway service providing dynamic routing, monitoring and more
Zuul is an L7 application gateway that offers many capabilities, including dynamic routing, monitoring, security, resiliency and more. It is used in the backend of the Netflix streaming service as a front door for all requests from devices and web sites. Zuul is ideal for cases like this where API traffic volume and diversity can become overwhelming and cause production issues to arise suddenly and without warning. Zuul has a broad range of filters that enable it to perform multiple functions quickly and apply functionality to services like Netflix. These functions include security authentication, dynamic routing, stress testing, load shedding and more. -
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floci
Light, fluffy, and always free, the AWS Local Emulator alternative
Floci is a free, open-source local AWS emulator designed as a lightweight alternative for testing cloud applications without using a real AWS account. It is built around a simple Docker-based workflow where developers can start the emulator and point standard AWS tools at a local endpoint. The project emphasizes no accounts, no authentication gates, no paid feature tiers, and broad local service coverage. It supports many AWS-style services, including storage, queues, databases, identity, compute, streaming, deployment, and infrastructure-related APIs. Floci is useful for development teams that want faster feedback loops, cheaper local testing, and repeatable integration environments. It also includes compatibility testing, multi-account isolation, persistence modes, SDK integration, and migration guidance for teams coming from other local cloud emulators. -
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Client-server based software that talks to Digitrax LocoNet. TCP server talks through a hardware interface (e.g. LocoBuffer) to LocoNet. (User interface) clients talk to that server.
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COBOL copybook to XML converter
Converts cobol copybooks to Xml/Java objects
CB2XML (CopyBook to XML) is a COBOL CopyBook to XML converter written in Java and based on the SableCC parser generator. This project includes utilities to convert an XML instance file into its COBOL copybook equivalent string buffer and vice versa. Source is now available in GitHub: https://github.com/bmTas/cb2xml -
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MicroZip
Create,extract and encrypt ZIP,GZIP,TAR,BZIP2,TAZ files on Java mobile
MicroZip is a powerful file compression and encryption utility for mobile phones which allows you to create and extract compressed archives in multiple formats and encrypt sensitive information with powerful AES-256 encryption. MicroZip can create and extract ZIP,TAR,TGZ,TBZ2 archives and extract many other formats as JAR,GZ,BZ2,TBZ,WAR,BZIP2,GZIP,Z,TAZ,CBZ etc. MicroZip allows you to extract selected files without extracting the whole ZIP archive. MicroZip also supports encrypted ZIP archives with both classic ZIP encryption and AES 256 encryption algorithm. -
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New owners (Oracle), new rules: Vdbench has been moved to Oracle Technology Network (OTN) http://www.oracle.com/technetwork/server-storage/vdbench-downloads-1901681.html
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Applied Infinity
CDN
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droiD64 is a graphical filemanager for D64 files (Commodore 64 and others). May this tool make life easier for Commodore 64 fans, especially for those using MAC and Linux systems as there are tools available for Windows anyway.
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Be warned this project was discontinued in 2013 and has not been updated in years.
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For new versions, check https://github.com/Darkkey/javaNetSim javaNetSim (Java Network Simulator) - it's a fork of a project jFirewallSim. The main goal of javaNetSim is creating a software to simulate various TCP/IP networks based on Ethernet, WiFi, PPP, etc...
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AppleCommander is a tool that manipulates Apple ][ disk images. Files may be imported, exported, viewed, or printed with various file filters. ** PLEASE NOTE THAT WE HAVE MOVED TO GITHUB! https://github.com/AppleCommander **
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LocalServer
LocalServer is a Web Server software for windows
LocalServer is a Web Server software for Windows that allows you to make your Computer into a Web Server Locally in which there is the Apache Server, PHP, and MySQL Server, which has been summarized in a single container setup.exe. The advantages of this software is Free except you do not need to advance other similar software, which is installed by default on your computer, because the Apache Server and MySQL Server will be installed on LocalServer first time on a different port, the Apache server running on port 4008 and MySQL Server running on port 3308. The latest version has been on the Release of version 1.0.1 that is made on the date of 26-10-2012, which has been running stable on Windows devices with the addition of the mail server that Mercury mail. Hopefully LocalServer useful for you to use, and congratulations creative with LocalServer Thank you! -
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WiKID Two-Factor Authentication System
Two-factor authentication system
The WiKID Strong Authentication System is a public-key based two-factor authentication system. It is a flexible, extensible, and secure alternative to tokens, certs and passwords. Application & API support exists for Java, ASP, PHP, Ruby, OpenVPN, TACACS+, etc. Read our eGuide on how to setup your network with two-factor authentication: http://www.wikidsystems.com/learn-more/two-factor-authentication-white-papers -
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The goal of this project is to build a configuration manager in Java that works with xml files, an URL or a LDAP repository to read the configuration properties. MBean / JBoss support is now available.
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Peers is a very simple softphone. It's a SIP User-Agent, written in java, it works on windows, linux and mac. It can be used with SIP servers like opensips or asterisk IPBX. It supports G711 codec (PCMU and PCMA) and telephone-events (DTMF).
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Shasummer is a SHA hashsum utility in Java. It can calculate SHA1, SHA256 and SHA512 hashes of a file or of a directory (and its subdirectories) and verify the hashes later. Shasummer has a graphical and a command-line interface.
