Browse free open source JavaScript System Software and projects below. Use the toggles on the left to filter open source JavaScript System Software by OS, license, language, programming language, and project status.
Ship Agents Faster
Transform your applications and workflows into powerful agentic systems at global scale.
Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
Start Free
PRTG Catches Network Issues Before They Cause Downtime
Threshold-based alerts flag problems early, so your team can act before users notice, not after.
Reactive troubleshooting usually means hearing about a problem from frustrated users, not your monitoring tool. PRTG sets threshold-based alerts across devices, servers and applications, notifying your team by email, SMS or push the moment a metric crosses a set limit. That means catching a failing disk or overloaded server before it becomes an outage and getting time back from firefighting. Start a free trial and set your first alerts today.
OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux. It contains services like SSH, (S)FTP, SMB/CIFS, DAAP media server, RSync, BitTorrent client and many more. Thanks to the modular design of the framework it can be enhanced via plugins.
OpenMediaVault is primarily designed to be used in home environments or small home offices, but is not limited to those scenarios. It is a simple and easy to use out-of-the-box solution that will allow everyone to install and administrate a Network Attached Storage without deeper knowledge.
A script to find open Wi-Fi connections and the strongest signal
AutoAP is a script that continuously scans for open Wi-Fi connections, tests them for validity, and connects to the strongest signal. If the connection is lost, the script scans again and finds the strongest valid signal again, and maintains a continuous connection to the internet in a mobile or portable environment. The script paremeters are highly configurable, including ability to configure secure connections.
AutoAP is an add on to DD-WRT that allows routers to continuously scan for and connect to open (and predefined WEP) wireless networks. Ultimately the goal is to develop an easily deployable firmware that facilitates fast and easy mesh network creation.
Typically, you would use this script on your router while in Repeater Mode, Client Mode, or Client-Bridged Mode.
Asuswrt-Merlin is a third party firmware for select Asus wireless routers. Based on the Asuswrt firmware developed by Asus, it brings tweaks, new features and other improvements to the original firmware, while retaining its performance and ease of use.
Note that only downloads are hosted on SF.net - the complete source code can be found on https://github.com/RMerl/asuswrt-merlin (legacy 380.xx) and https://github.com/RMerl/asuswrt-merlin.ng (382 and newer releases).
Zero Install is a decentralised cross-distribution software installation system. Create one package that works everywhere! With dependency handling and automatic updates, full support for shared libraries, and integration with native package managers
This repository contains the source code of the Arduino IDE 2.x, which is currently in the beta stage. The Arduino IDE 2.x is a major rewrite, sharing no code with the IDE 1.x. It is based on the Theia IDE framework and built with Electron. The backend operations such as compilation and uploading are offloaded to an arduino-cli instance running in daemon mode. This new IDE was developed with the goal of preserving the same interface and user experience of the previous major version in order to provide a frictionless upgrade. If you need assistance, see the Help Center and browse the forum. If you think you found a vulnerability or other security-related bug in this project, please read our security policy and report the bug to our Security Team. The builds are generated every day at 03:00 GMT from the main branch and should be considered unstable.
Open Source Monitoring System for performance and availability.
Pandora OPEN is a high-performance, 100% open-source monitoring ecosystem, born as the independent evolution of the Pandora FMS community branch after version 777. Licensed under GPLv2, it provides a modular and sovereign platform for supervising networks, servers, and applications without commercial dependencies. It features multi-platform agents, remote monitoring (SNMP, WMI, HTTP), GIS maps, and advanced visual dashboards. Entirely maintained by the community on GitHub, it ensures total transparency, technical flexibility, and absolute freedom for system administrators.
Documentation For Microsoft Activation Scripts (MAS)
massgrave.dev is a documentation and distribution platform associated with the Microsoft Activation Scripts project, providing a centralized interface for accessing tools and resources related to Windows and Office activation workflows. It serves as both a user-facing website and a repository-backed documentation hub that explains how to use various activation methods implemented through open-source scripts. The platform focuses on simplifying complex activation procedures by offering clear instructions, automated scripts, and troubleshooting guidance. It supports multiple activation approaches, including hardware-based activation and key management services, enabling compatibility across different Windows and Office versions. The project is maintained as an open-source initiative, allowing transparency in how activation mechanisms are implemented and executed. It also emphasizes ease of use by providing streamlined commands and menu-driven interfaces for non-technical users.
Unlimited Telegram cloud drive across 5 platforms & 11 languages.
TeleDrive is a 100% open-source virtual cloud filesystem that turns private Telegram storage channels into an unthrottled, unlimited personal cloud drive with zero monthly subscription fees.
Connect directly to Telegram MTProto 2.0 datacenters with zero relay servers and zero cloud storage bills.
Key Highlights:
• Zero Monthly Rent: Unlimited file storage via private Telegram channels.
• 5 Native Platforms: Builds for macOS (DMG), Windows (EXE/MSI), Linux (AppImage/DEB/RPM), Android (APK), and iOS (IPA).
• 11 Languages: Full localization for EN, PT-BR, ES, HI, ZH-CN, ZH-TW, RU, FR, DE, JA, and ID.
• Tauri 2.0 & Rust: Under 250MB RAM usage with sub-millisecond zero-copy binary IPC streaming.
• Built-In Workstation: Continuous PDF viewer, interactive CSV data explorer, CodeMirror 6 code editor, and 4K media streaming.
• Automated Backup: Rust folder crawler with SHA-256 diff snapshots.
Official Site: https://www.teledrive.space | GNU GPLv3
Increase your system performance with this easy to use tool
Please note, here you can find the latest open source release of UltraDefrag (7.1.4). The most recent UltraDefrag release (16.0.0) can be found on our official website: https://ultradefrag.net
UltraDefrag is a disk defragmenter for Windows, which supports defragmentation of locked system files by running during the boot process. It is easy to use without any complicated scripting or a huge load of configuration settings. You can filter the files processed by size, number of fragments, file name and path. You can terminate the process early by specifying an execution time limit.
Motrix is a full-featured, cross-platform download manager that supports downloading HTTP, FTP, BitTorrent, Magnet, Baidu Net Disk and more. It’s got an interface that’s clean, simple and easy to use, plus a number of great features. It can handle up to 10 concurrent downloads, can support 64 threads in a single task, support speed limit and more! It comes in both Chinese and English with many other translations in the works, and has dark mode available.
All your computers and your phone, working as one desk
TwinDesk is a free, open-source application designed to connect computers and Android devices into a unified workspace. It enables users to share a mouse and keyboard across Windows, macOS, Linux, and Android devices. The software supports screen sharing, remote application windows, and turning secondary devices into additional displays. Users can transfer files, synchronize clipboards, and share cameras and audio between connected systems. Android integration provides access to phone calls, text messages, notifications, and device controls from a computer. Connections can operate through local networks, USB, Bluetooth, or direct Wi-Fi links. Devices communicate through encrypted connections without requiring accounts or cloud services. TwinDesk provides flexible cross-device workflows with individually enabled features.
AnduinOS is a custom Ubuntu-based Linux distribution
AnduinOS is a personal/experimental operating system–style project and collection of components built to explore how a desktop-like environment and tooling could be organized under one coherent repo. It combines configuration, scripts, and UI elements to form a workstation experience that is more opinionated and automation-friendly than a vanilla setup. The project leans toward developer productivity: quick access to tools, reproducible configuration, and a unified place to evolve the environment. Because it is open source, users can inspect how the author wires services, handles packaging, or defines UI/UX conventions. It’s well suited for people who want to understand how to bootstrap and maintain a bespoke, code-driven desktop environment rather than relying on distro defaults. Over time it can serve as a living example of infrastructure-as-code principles applied to a personal OS setup.
Career Ops is an open-source platform designed to help individuals manage their job search process with a structured, operations-style approach that treats career development like a pipeline. It provides a system for organizing job applications, tracking progress across different stages, and maintaining visibility into opportunities, much like a lightweight CRM tailored for job seekers. The project emphasizes clarity and accountability, enabling users to monitor applications, follow-ups, and outcomes in a centralized environment. It is typically built with modern web technologies, allowing for easy customization and self-hosting by developers who want full control over their data. Career Ops focuses on reducing the chaos and fragmentation that often comes with job searching by introducing a repeatable workflow that can be iterated and improved over time. It also supports the idea of data-driven job searching.
Easily manage the brightness of your monitors in Windows
Twinkle Tray enables brightness control on external displays in Windows 10 & 11. Even though Windows is capable of adjusting the backlight on most monitors, it doesn't support external monitors natively. Windows also lacks any options to manage the brightness of multiple displays. This app inserts a new icon into your system tray, where you can click to have instant access to the brightness levels of all compatible displays.
Windows 95 in Electron. Runs on macOS, Linux, and Windows
windows95 in Electron is a quirky, nostalgia-driven project that ports a complete emulation of Microsoft Windows 95 into a desktop application that runs on modern operating systems like Windows, macOS, and Linux. It essentially wraps an emulator — preconfigured to boot Windows 95 — inside a user-friendly app built with web technologies so developers and hobbyists can explore the look and feel of that classic OS without needing legacy hardware or complicated setup. Users can interact with familiar UI elements like the Start menu, File Explorer, and retro applications in a sandboxed environment that evokes early personal computing. Beyond being a playful trip down memory lane, the project demonstrates how emulation can be packaged using modern frameworks & how legacy operating systems can be encapsulated as distributable desktop experiences. It’s become an example of how software preservation and creative programming can intersect, inspiring others to bring historic systems to life.
EndeavourOS-ISO is the official installation image build system for EndeavourOS, a community-driven Arch Linux–based distribution that focuses on providing a minimal, flexible, and user-friendly Arch experience. The repository contains the scripts, configurations, and package selections required to generate the live ISO used to install the operating system, allowing developers and contributors to customize installation environments and desktop setups. It leverages the Calamares installer to provide a guided installation process while still maintaining the transparency and control expected from an Arch-based system. The project supports both offline and online installation modes, where users can choose between preconfigured desktop environments or build a custom system from scratch. It emphasizes simplicity, speed, and user empowerment, avoiding unnecessary bloat while still offering helpful defaults.
Modify Apple network location (gs-loc) to return coordinates
Apple WLOC is a network-location modification project for Apple WLOC positioning responses. It is designed to change the coordinates returned by Apple’s Wi-Fi and cell-tower location service, creating a virtual iOS network-location result. The project supports several proxy and scripting tools, including Surge, Quantumult X, Loon, Stash, Shadowrocket, and Egern-compatible workflows. It includes a web-based location picker as well as Shortcuts-based setup and restore options. The picker can parse location links from Apple Maps, Google Maps, Amap, Baidu Maps, and coordinate text. Overall, it is a specialized iOS networking and location-testing utility for users who understand proxy rules, MITM certificates, and the limits of network-based positioning.
RetroPie BIOS is a curated collection of BIOS files intended for use with the RetroPie emulation platform, providing the essential firmware required to run a wide range of classic gaming systems. The repository organizes BIOS files for numerous consoles and arcade systems, ensuring compatibility with RetroPie and related emulation environments. Each file in the collection has been verified against reference databases such as the Libretro system definitions, ensuring accuracy and reliability. The project simplifies the process of setting up emulation systems by consolidating required BIOS files into a single, organized package that users can directly integrate into their RetroPie installation. It also includes checksum validation mechanisms, allowing users to verify file integrity and ensure that BIOS files match expected standards. By maintaining a structured and verified dataset, the repository reduces common issues associated with missing or incorrect BIOS files.
A web-based interface for CNC milling controller running Grbl, Marlin,
A web-based interface for CNC milling controller running Grbl, Smoothieware, or TinyG. It runs on a Raspberry Pi or a laptop computer that you have Node.js installed, connecting to the Arduino over a serial connection using a USB serial port, a Bluetooth serial module, or a Serial-to-WiFi module like XBee or USR-WIFI232-T.
Nagios Open Source network monitoring software - The Standard In ITM
Nagios network monitoring software is a powerful, enterprise-class host, server, application, and network monitoring tools. Designed to be fast, flexible, and rock-solid stable. Nagios runs on *NIX hosts and can monitor Windows, Linux/Unix/BSD, Netware, and network devices.
SockJS is a browser JavaScript library that provides a WebSocket-like object. SockJS gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server. Under the hood SockJS tries to use native WebSockets first. If that fails it can use a variety of browser-specific transport protocols and presents them through WebSocket-like abstractions. SockJS is intended to work for all modern browsers and in environments which don't support the WebSocket protocol, for example, behind restrictive corporate proxies. SockJS-client does require a server counterpart, such as SockJS-node, which is a SockJS server for Node.js. The API should follow HTML5 Websockets API as closely as possible. All the transports must support cross domain connections out of the box. It's possible and recommended to host a SockJS server on a different server than your main web site.
JS tool for obtaining network disk file download addresses
LinkSwift is a JavaScript userscript that enhances web interfaces for several major Chinese cloud-storage services and helps retrieve download URLs through their public APIs. It supports platforms including Baidu Netdisk, Aliyun Drive, China Mobile Cloud, Tianyi Cloud, Xunlei Cloud, Quark, UC, 123 Cloud, and additional supported providers. The script modifies supported websites with a cleaner interface and additional file-download controls. Retrieved links can be handed to compatible external download managers rather than relying exclusively on each provider's standard browser downloader. The project offers both stable and canary releases, with the latter receiving newer fixes and features first. Its maintainers explicitly state that LinkSwift does not promise to bypass provider speed limits, since download performance still depends on service policies and network conditions.
bWAPP, or a buggy web application, is a free and open source deliberately insecure web application.
bWAPP helps security enthusiasts, developers and students to discover and to prevent web vulnerabilities. bWAPP prepares one to conduct successful penetration testing and ethical hacking projects. What makes bWAPP so unique? Well, it has over 100 web bugs! It covers all major known web vulnerabilities, including all risks from the OWASP Top 10 project. The focus is not just on one specific issue... bWAPP is covering a wide range of vulnerabilities!
bWAPP is a PHP application that uses a MySQL database. It can be hosted on Linux/Windows with Apache/IIS and MySQL. It is supported on WAMP or XAMPP. Another possibility is to download bee-box, a custom VM pre-installed with bWAPP.
This project is part of the ITSEC GAMES project. You can find more about the ITSEC GAMES and bWAPP projects on our blog.
For security-testing and educational purposes only!
Cheers
Malik Mesellem
EmulatorJS is a web-based frontend for RetroArch that allows users to run retro games directly in a browser without requiring local emulator installations. Built using JavaScript and WebAssembly technologies, it provides access to a wide range of console and arcade systems through a unified interface. The project functions as a library or plugin rather than a standalone application, enabling developers to embed emulation capabilities into websites or custom platforms. It offers multiple build versions, including stable, latest, and nightly, allowing users to balance reliability and cutting-edge features depending on their needs. EmulatorJS leverages CDN distribution for easy deployment and scalability, making it accessible for both personal and production environments. Its architecture supports multiple cores, each corresponding to a different system, enabling broad compatibility across retro gaming platforms.
You are visitor 01402503 — GeezerVison does not store the pages you look up. Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.
