Browse free open source System software and projects for Windows and Windows Mobile below. Use the toggles on the left to filter open source System software by OS, license, language, programming language, and project status.

  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
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    Try Google Cloud Risk-Free With $300 in Credit

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  • 1
    GPS Datalogger Device Control
    i-Blue 747 / i-Blue 757 / Qstarz BT-Q1000 / i.Trek Z1 / Konet BGL-32 / Holux M-241 / ... control SW (for Java Phones, PalmOS, WinCe (PPC), Java platforms, Windows, Linux, and MacOS). Compatible with most MTK GPS Chipset based loggers.
    Downloads: 30 This Week
    Last Update:
    See Project
  • 2
    BSOD Mkr
    New downloads of this software has been moved here: http://www.bsodmkr.com/
    Downloads: 2 This Week
    Last Update:
    See Project
  • 3
    Open NFC

    Open NFC

    Open-source Hardware-independent NFC protocol stack.

    Open NFC is an open source stack implementing the NFC functionnalities for many OSes. The Open NFC stack offers a comprehensive set of NFC API for Android, Linux and Windows Mobile.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 4
    Aegis Implicit Mail (AIM)

    Aegis Implicit Mail (AIM)

    Send Mime and Smime Emails to Any Type of Mail Server

    Aegis Implicit Mail is a free and open source library which is designed to provide fast and developer friendly API to send emails using SMTP ports. Binaries are available in the form of NuGet package: https://www.nuget.org/packages/AIM Please check http://pki.tools/aim.html as well AIM Supports : * None Ssl Mails * Implicit Ssl Mails * Explicit Ssl Mails * Smtp Connection test * Detect Ssl type of mail server * Attachments for MIME and S/MIME message. * In-line attachment and separate file attachment * All content types and mimes * SMIME , Signed and Encrypted mails In an integrated way Sadly, Microsoft.Net.Mail Ssl Mails does not support Implicit Ssl Mail and it is still used by many servers, including port 465 of Gmail here AIM comes to make a readable and fast alternative to send your smtp mails. For unicode issues please refer to https://sourceforge.net/p/netimplicitssl/tickets/4/ . We really appriciate any help in testing of different encodings
    Downloads: 0 This Week
    Last Update:
    See Project
  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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  • 5

    Chameleon

    A multi-platform group communication framework for smartphones

    Chameleon is a group communication framework. As such, it simplifies building server-less, multi-peer connected applications for smartphones and some PC platforms. It is available in J2ME, J2SE, Android, .NET and .NET Compact Framework platforms.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    CrossBrowdy

    CrossBrowdy

    JavaScript framework to build game engines, games, emulators and apps

    CrossBrowdy is a free and open-source JavaScript framework that allows to create multimedia apps, emulators, game engines and games that will be compatible with any device. Any software developed with CrossBrowdy should be able to be used in any JavaScript compatible web client (including browser plug-in, add-on, extension, app...) which supports "document.getElementById". This framework allows any developer to manage easier many different things, such as audio (with Flash fallback, audio pool, etc.), canvas (with DHTML, VML, Flash or Silverlight fallbacks), screen, mouse, keyboard, gamepads, sockets (including PHP proxy fallback), XHR / AJAX (with PHP proxy for cross-domain requests), device sensors (compass / magnetometer, gyroscope, accelerometer, light sensor, proximity sensor...) and many more.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Defa Protect HTML5 Video From Download

    Defa Protect HTML5 Video From Download

    Prevent and Protect Your HTML5 Video, Music , Audio From Download Free

    Defa Protector is A Simple PHP and Wordpress Plugin To Protect and Prevent Video Save As From Browser and Some Video Grabber. There is 100% Guaranteed Protection and There might be some tradeoff but If you care about Digital Rights Management of Your Video and Music Content. This Project is for you. Defa Protector 6.7.1 Revamp Code For Better Performance To The Bone. We almost rewritten this project from scratch.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    DotNetOpenServer SDK

    DotNetOpenServer SDK

    Lightweight fully extendable client/server application framework

    DotNetOpenServer SDK is an open source lightweight fully extendable TCP socket client/server application framework enabling developers to create highly efficient, fast, secure and robust cloud based smart mobile device and desktop applications. Why? Unlike most application server frameworks, which are implemented over slow inefficient stateless protocols such as HTTP, REST and SOAP that use bulky ASCII data formats such as JSON and XML, DotNetOpenServer has been built from the ground up with highly efficient stateful binary protocols.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    DropYet

    DropYet

    It's the simple cloud.

    With DropYet you can manage your personal files in the easiest way. And it's not that bad looking. :) Enjoy the security, simplicity and beauty of DropYet. Upload, rename and delete files. The simpliest manager of files and folders. Furthermore, there are more features like securely sharing files, password encryption and encrypted file detection. Setting it up is easier than ever before. Just try DropYet. Currently working on MORE features for you. Now with Dark Mode! Requirements: PHP (recommended is 7 and higher), HTML, cURL, sendmail Read everything else on our website! :) https://dropyet.maximiliansixdorf.de/en
    Downloads: 0 This Week
    Last Update:
    See Project
  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
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  • 10
    Jadabs is a dynamic lightweight container for small devices in a distributed environment. Many distributed infrastructures exists so fare like Jini, Jxta, Messaging Systems, etc. All of them lack so fare the possibility to be run on small devices.
    Downloads: 0 This Week
    Last Update:
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  • 11
    A backup utility for Windows 32-bit, 64-bit, and CE based systems intended to be easy and simple to use and open source.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    RemoteStreamer.Net
    RemoteStreamer.Net is a simple Remotedesktop programm written in C#. It is optimized for control with Touchscreen. With Client for Windows Mobile(Optimized for HTC HD2 and Tested)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    The Open Translation Network will assist people in translating and revising any textual document. Based on P2P technology, it will allow users to request/provide the translation or the revision of virtually any textual document.
    Downloads: 0 This Week
    Last Update:
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  • 14
    Unreal Speccy portable

    Unreal Speccy portable

    Portable ZX-Spectrum emulator based on UnrealSpeccy 0.37.3 by SMT

    Portable ZX-Spectrum emulator supports Z80 128K (Pentagon) AY/YM, Beeper, Beta Disk, Tape, Kempston Joystick/Mouse, Snapshots, Replays. Supported formats: sna, z80, szx, rzx, tap, tzx, csw, trd, scl, fdi, zip. Created to be ported to many platforms such as Windows/Linux/Mac/Symbian/Dingoo A320/Android/iOS/PSP/Raspberry Pi, ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    WOSH Framework - Wide Open Smart Home
    WOSH is a multi-platform message-oriented middleware written in ANSI C++. Service oriented architecture, designed for network distributed computing. Already working: Audio multimedia, X10, remote control (WinMobile, GTalk) and much more..
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Created by Moviquity and based on studies within the project Workpad, it offers a code in C# to deploy a MANET (Ad-Hoc, Meshnet) with protocol OLSR. Developed for WM 6, Win XP and can be adapted to other platforms using NET Framework and Compact
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    This project designs the oswrap including task scheduler, timer, semaphore, mailbox, wait, memory key components. Support Linux and windows platform and distributed system.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    yaSSL, or yet another SSL, is an embedded ssl library for programmers building security functionality into their applications and devices. yaSSL is highly portable, and runs on standard as well as embedded platforms(QNX, ThreadX, VxWorks, Tron) yaSSL is still available but no longer being developed. Current development on the same project continues under wolfSSL. Visit yaSSL Home above for the latest stable release.
    Downloads: 0 This Week
    Last Update:
    See Project
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