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.

  • 8 Monitoring Tools in One APM. Install in 5 Minutes. Icon
    8 Monitoring Tools in One APM. Install in 5 Minutes.

    Errors, performance, logs, uptime, hosts, anomalies, dashboards, and check-ins. One interface.

    AppSignal works out of the box for Ruby, Elixir, Node.js, Python, and more. 30-day free trial, no credit card required.
    Start Free
  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Try Free
  • 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/.
    Leader badge
    Downloads: 164 This Week
    Last Update:
    See Project
  • 2
    The ftp4j library implements a Java full-featured FTP client. With ftp4j embedded in your application you can: transfer files (upload and download), browse the FTP site (directory listing), create, delete, rename and move directories and files.
    Downloads: 22 This Week
    Last Update:
    See Project
  • 3
    Fast Artificial Neural Network Library is a free open source neural network library, which implements multilayer artificial neural networks in C with support for both fully connected and sparsely connected networks. Cross-platform execution in both fixed and floating point are supported. It includes a framework for easy handling of training data sets. It is easy to use, versatile, well documented, and fast. Bindings to more than 15 programming languages are available. An easy to read introduction article and a reference manual accompanies the library with examples and recommendations on how to use the library. Several graphical user interfaces are also available for the library.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 4
    Early Access iText, a PDF generation library in Java
    Downloads: 10 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.
    Try Retool free
  • 5
    POCO C++ Libraries

    POCO C++ Libraries

    Cross-platform C++ libraries with a network/internet focus.

    NOTE: Current source code as well as bugs/patches are on GitHub: https://github.com/pocoproject/poco/ C++ class libraries for network-centric, portable applications, integrated perfectly with the C++ Standard Library. Includes network protocols (Sockets, HTTP, FTP, SMTP, POP3, etc.), SQL database access and XML parsing. Licensed under Boost license.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    SMTP4PHP

    SMTP4PHP

    PHP powerful tool for sending e-mails fast and easily

    SMTP4PHP is a collection of PHP classes, dedicated for composing and sending multipart/mixed email messages quickly and easily, with or without embedded images and/or attachments.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    pidCrypt
    pidCrypt is no longer maintained! pidCrypt is a crypto library offering modular cryptographic functions in JavaScript. Supports: AES (CBC & CTR Mode), RSA, MD5, SHA-1, SHA-256, SHA-384, SHA-512, ASN.1, Base64, UTF-8. The AES-CBC mode is compatible to OpenSSL.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    Neural Mesh
    Neural Mesh is a purely PHP, fast, easy Neural Network Manager, Administrator and Framework. It allows you to integrate Artificial Intelligence into your applications, quickly and easily, no matter what your experience.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    Authen::Simple::WebForm - Perl library for simple authentication against existing web based forms using Authen::Simple framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 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.
    Start Free
  • 10
    AutoDiscovery Library

    AutoDiscovery Library

    A tiny library to add auto discovery capability into your applications

    A tiny and simple 100% Java library (without any dependency) to easily enable your application to automatically discover the presence of other instances of itself running on the other computers connected to the same LAN network, without having to deal with protocols and network configurations. The protocol used by the library is peer-to-peer, so you don't need a central server. The API is simple, straightforward and there are examples and full documentation to learn it in minutes.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    CubeScribe

    CubeScribe

    Render Rubiks Cube OLL and PLL Algorithm Diagrams with HTML5 & JS

    A simple JavaScript class that utilizes the HTML 5 canvas element to render the face diagrams often used to document Rubik's Cube algorithms.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12

    FTPLIB

    FTP client class library.

    Ftp classes, currently only FTP Client is implemented.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Library for accessing FTP servers using .NET.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    HTML Canvas Javascript Library
    A full-featured lightweight wrapper library of the native html canvas element written in Javascript, aimed to make visualization and animation using canvas simpler. Features animation support, layers, event capture, multitouch and many examples.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    A pure java DNS client implementation. Consists of a library and utilities for looking up the Internet domain names. The utilities are also able to fetch an entire domain zone and save it in the standard DNS zone file format.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    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
    Last Update:
    See Project
  • 17
    NBBC is a high-speed, extensible, sophisticated, well-documented, easy-to-use validating BBCode parser written in PHP. ________________________ NOTE: THIS COPY OF NBBC HAS NOT BEEN UPDATED IN A LONG TIME. There are currently two active maintainers of NBBC: - Theyak (https://github.com/theyak/nbbc) has a copy of NBBC that still works with PHP 4, and is still more-or-less the 1.x source tree, but it has had some of the outstanding bugs fixed. - Vanilla (https://github.com/vanilla/nbbc) has been actively maintaining NBBC, and now has a v2.x that has been upgraded to support modern PHP 5/6/7 and has new features and functionality. If you want the latest edition of NBBC, this is probably the right place to go!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    PHP4sack
    A PHP encapsulation of the AJAX sack library so that developers need only code in PHP to implement AJAX, Feedback will be good to improve this component set. Now supporting cross browser drag and drop events, no other library dependencies.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19

    ReCaptcha plugin for Kooboo CMS

    ReCaptcha Validator Plugin for Kooboo CMS for add content or send mail

    ReCaptcha Validator Plugin for Kooboo CMS for adding content or sending feedback e-mail
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Right Consents Community

    Right Consents Community

    Open and extensible platform to manage consents and preferences

    Right Consents is a Consent and Preference Management Platform which leverage consent to another scope than cookies, where consent based processing implies conformity, like receipt preservation and consent dissemination to third-part software or company. More information at https://right-consents.fairandsmart.io/
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Speedcoin CryptoCurrency CAPTCHA

    Speedcoin CryptoCurrency CAPTCHA

    Protecting against spam, death by captcha and monetise your website.

    It is a simple PHP/MySQL script which you can easily integrate into your own website in minutes Users of your website will see the Speedcoin Captcha box on your website page with information that they need go to Speedcoin.co, where they will FREELY obtain up to 150 Free Speedcoins . Your user then sends a certain amount of those Speedcoins to the Speedcoin address at the Captcha box. After our system receives these Speedcoins from your user (it takes few seconds only), our website will confirm to your website that your new customer is a real individual. You protect your website against spam bots, prevents the same user re-filling web forms with different email addresses and at the same time you will get free Speedcoins which you later can convert to Bitcoins. Live Demo: http://captcha.speedcoin.co/demo/example_form.php Website: http://speedcoin.co/info/captcha/Speedcoin_Captcha.html .
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    C# .NET library implementing the Pop3 message retrieval protocol
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Smtp client libraru written entirely in C# for use within any C#, VB.NET, C++.NET or F# application
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Toolkit e-formulieren is een opensource toolkit voor het op een gebruikersvriendelijke manier kunnen maken en onderhouden van e-formulieren. De Toolkit maakt gebruik van Orbeon, en ondersteunt XForms-compliant e-formulieren, evt. met voorinvulling.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Transform SWF is an easy to use library for reading and writing Flash and Flash Video files. 06/12/2010: This project is now hosted on GitHub: https://github.com/StuartMacKay/transform-cxx
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • Next
MongoDB Logo MongoDB