Browse free open source Libraries and projects for Windows below. Use the toggles on the left to filter open source Libraries 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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  • Stop Storing Third-Party Tokens in Your Database Icon
    Stop Storing Third-Party Tokens in Your Database

    Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.

    Rolling 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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  • 1
    iText®, a JAVA PDF library

    iText®, a JAVA PDF library

    PDF Library for Developers

    iText is an open-source PDF library available for Java and .NET (C#). iText allows you to effortlessly generate and manipulate standards-compliant PDF documents with a powerful and feature-rich SDK. With iText, you can create archivable and accessible PDFs, split and merge documents, fill and flatten forms, digitally sign documents, and more. iText add-ons enable additional functionality, such as PDF creation from HTML templates, secure redaction, OCR, and much more. The latest versions of iText build on the success of previous versions and feature an improved document engine, high and low-level programming capabilities, and a more efficient modular structure. iText represents the next level for developers looking to leverage PDF in document workflows. The main project page for iText is now on GitHub, and all the latest releases, code samples, open source add-ons and tools, etc. can be found at https://github.com/itext/.
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    Downloads: 165 This Week
    Last Update:
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  • 2
    CSSBox

    CSSBox

    Pure Java HTML / CSS rendering engine

    CSSBox is an (X)HTML/CSS rendering engine written in pure Java. Its primary purpose is to provide a complete information about the rendered page suitable for further processing. However, it also allows displaying the rendered document.
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    Downloads: 15 This Week
    Last Update:
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  • 3
    WebKit .NET
    WebKit .NET is a control library wrapper for WebKit written in C#. The aim is to make it easy for users to incorporate WebKit into their .NET applications.
    Downloads: 8 This Week
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  • 4
    Early Access iText, a PDF generation library in Java
    Downloads: 19 This Week
    Last Update:
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  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

    NVIDIA L4 GPUs. 5-second cold starts. Scale to zero when idle.

    Deploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
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  • 5
    Simple Network Management Protocol (SNMP) .Net library written in C# (csharp). Implements protocol version 1, 2 and 3
    Downloads: 7 This Week
    Last Update:
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  • 6
    silvertunnel - Java lib+browser for TOR
    silvertunnel.org is a project that provides an end-user browser, a Java library and additional Java security tools to easily access anonymity networks such as the Tor (torproject.org) network. Secure and easy to use. Tor4Java and Tor Browser. Attention: see project status on page https://sourceforge.net/p/silvertunnel/discussion/962278/thread/83dc2d02/#
    Downloads: 4 This Week
    Last Update:
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  • 7
    jit enables lazy loading of javascript resources by injecting proxy functions that will load the required script the first time they are used.
    Downloads: 6 This Week
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  • 8
    dompdf - the PHP 5 HTML to PDF converter. dompdf is a (mostly) CSS compliant HTML rendering engine written in PHP. It supports external stylesheets, inline style tags, and the style attributes of individual HTML elements. Requires PHP 5.
    Downloads: 2 This Week
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  • 9
    CppWeb - C++ Web developement framework

    CppWeb - C++ Web developement framework

    Cross-platform C++ library for developing CGI Web applications

    CppWeb is cross-platform C++ library for developing web applications with server push support. The library decodes CGI variables and cookies, supports file uploads, performs automatic cookie detection, provides URL and HTML entity encode/decode functions, supports server-push (long-polling via ajax), has built-in HTML parser, SQLite database wrapper etc. CppWeb compiles on Windows, Linux and MacOSX (tested with GNU C++, MingW, MS Visual C++ and Borland C++ compiler) and can run with almost any web server (Apache, IIS, Boa etc.). Can be used in embedded systems (tested with FriendlyARM Mini2440 and Raspberry PI)
    Downloads: 0 This Week
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  • 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
    This is a JavaScript library which gives the ability to use cryptographic functionality abstracted of available technologies on the browser side. It executes a cryptographic function with the fastest technology including Java, JavaScript and Flash.
    Downloads: 0 This Week
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  • 11

    DBZUL

    Progect inactive due to lack of user interest

    Library for automatic creation of forms for viewing and editing of the given tables of a database. Allows to create ZUL files (zkoss.org) with use of a metainformation of a database.
    Downloads: 0 This Week
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  • 12

    DataUsagePrinter

    Creates printable string of data usage

    A simple utility which creates a printable string of data usage. E.g. supply the value 1234567890 and DataUsagePrinter will return the string "1GB 153MB 384KB 722B". Available as binary and source downloads for Java and C#.
    Downloads: 0 This Week
    Last Update:
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  • 13

    DotNetFtpLibrary

    Ftp client library .Net C#, download, upload, resume, events

    Ftp client library (framework) for .Net written in C#, download upload, resume, create directory recursive, events
    Downloads: 0 This Week
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  • 14
    Embedded HTTP Server (EHS) is a C++ class library which can be inherited from to add HTTP(S) server functionality to any class or application. It is easily extendable (samples included) and supports SSL, form data via POST or GET, uploads via multi-part form attachments and WebSockets. Operation modes include single- and multi-threaded operation.
    Downloads: 0 This Week
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  • 15
    Java library implementing simple management of application deployed in Google App Engine. Right now is supported only downloading and parsing of quota details. Which in fact the primary reason of existence of this library.
    Downloads: 0 This Week
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  • 16
    Java library to easily use Gure Gipuzkoa's public API. (http://guregipuzkoa.net/api/) Java application to easily upload sets of photos to Gure Gipuzkoa.
    Downloads: 0 This Week
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  • 17
    JSNAV - a library that allows to specify and save some javascript calls in the page's URI. This library helps to standardize the coding javascript URI handler in the anchors. Also it helps to keep the classic navigation anchors.
    Downloads: 0 This Week
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  • 18
    LeetSocket is an easy to use Socket Component, built on TCP, written in c# .net 2.0 Example Usage: Build a chat in 5 mins http://www.youtube.com/watch?v=Tm2jS6mQjRs Developers: Ahmet Yüksektepe Nick Russler
    Downloads: 0 This Week
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  • 19
    LocalJS
    Build Cloud Desktop Application with Web Pages. Deployed from Cloud, Run on Desktop, Developed with HTML + CSS + JavaScript. Two Simple Steps turn your HTML pages into Cloud Desktop Application: Find more at http://localjs.org/
    Downloads: 0 This Week
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  • 20
    ** Guys I have built a much more powerful Fully Featured CMS system at: https://github.com/MacdonaldRobinson/FlexDotnetCMS Macs CMS is a Flat File ( XML and SQLite ) based AJAX Content Management System. It focuses mainly on the Edit In Place editing concept. It comes with a built in blog with moderation support, user manager section, roles manager section, SEO / SEF URL
    Downloads: 0 This Week
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  • 21
    PHPCrawl is a high configurable webcrawler/webspider-library written in PHP. It supports filters, limiters, cookie-handling, robots.txt-handling, multiprocessing and much more.
    Downloads: 0 This Week
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  • 22
    This libpurple PHP binding, which defines a set of internal classes, gives a possibility to use aol and icq (oscar), yahoo, msn, jabber, irc and much more protocols directly from PHP. Write your own IM chat client in PHP, as simply as PHP enables it.
    Downloads: 0 This Week
    Last Update:
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  • 23
    This is a JavaScript library which gives the ability to use cryptographic functionality abstracted of available technologies on the browser side. It executes a cryptographic function with the fastest technology including Java, JavaScript and Flash.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    SimpleNet is a small Java network library that should aid in writing fast and lightweight network protocols without having to fuzzle around too much with protocol decisions. It mainly aides in message dispatching and abstraction.
    Downloads: 0 This Week
    Last Update:
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  • 25
    C# .NET library implementing the Pop3 message retrieval protocol
    Downloads: 0 This Week
    Last Update:
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