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

  • Veeam Data Platform v13.1 Icon
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  • 1
    .Net Framework 3.5 offline Installer

    .Net Framework 3.5 offline Installer

    .NetFramework 3.5 offline installer without any windows setup media

    Windows 8, and above version comes with version 4.x.x of .NET Framework. But if the user is upgrading from Windows 7 to Windows 8, .NET Framework 3.5 is fully enabled. Most of the existing software require version 3.5 of .NET Framework installed to be able to run. When you try to install an app that requires .NET Framework 3.5 on these latest Windows it asks to connect to Internet inorder to download required installation files.its difficult to download if user's internet speed is low. if the user has Windows installation media he simply install .netfx3. Both 2 above methods have their own limitation. if the user does not have internet connection from the system which need .ntfx3 and if the user does not have Windows installation media, this app helps them to install .netfx3 offline without any installation media. and internet. it saves internet bandwith & time when downloading windows installation files. and also it has the feature to install .netfx3 from windows installation media.
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    Downloads: 204 This Week
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  • 2
    Open source and free library in 'C' programming language for work with NMEA protocol. Small and easy to use. The library build on different compilers under different platforms (see below). The code was tested in real projects. Just download and try...
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    Downloads: 124 This Week
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  • 3
    Niagara AX Community Modules
    A library of modules for the Tridium Niagara AX platform. AX programmers are encouraged to use and expand the library.
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    Downloads: 66 This Week
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  • 4
    Rcbot2
    RCBot2 An open source GPL bot framework for HL2 Orange Box Mods ONLY
    Downloads: 25 This Week
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  • PRTG Catches Network Issues Before They Cause Downtime Icon
    PRTG Catches Network Issues Before They Cause Downtime

    Threshold-based alerts flag problems early, so your team can act before users notice, not after.

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  • 5
    QtAV

    QtAV

    A multimedia framework based on Qt and FFmpeg

    QtAV is a cross-platform and high performance multimedia playback framework based on Qt and FFmpeg. Features: timeline preview, gpu decoding etc
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    Downloads: 17 This Week
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  • 6

    Okapi Framework (Old .NET version)

    See http://okapi.opentag.com/ for LATES VERSION of the Okapi Framework

    THIS VERSION ON SOURCEFORGE IS NO LONGER SUPPORTED and works only on Windows. The Okapi Framework is a set of components and tools for localization and translation tasks. THE NEWEST JAVA-BASED VERSION OF OKAPI IS AVAILABLE AT: http://okapi.opentag.com/ The new version runs on Windows, Mac, Linux, etc.
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    Downloads: 17 This Week
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  • 7
    WebHarvest - web data extraction tool
    Web data extraction (web data mining, web scraping) tool. It leverages well proved XML and text processing techologies in order to easely extract useful data from arbitrary web pages.
    Downloads: 13 This Week
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  • 8
    mod_pLua

    mod_pLua

    An Apache module for developing web applications using Lua

    mod_pLua is a module for the Apache httpd web server, that enables the use of preprocessed (html-embedded) Lua scripts using a PHP-like syntax as well as CGI-style interfacing, but at a much faster pace. For a more detailed description, see the wiki: https://sourceforge.net/p/modplua/wiki/
    Downloads: 31 This Week
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  • 9
    Context-awareness is a key concept in ubiquitous computing. The Java Context-Awareness Framework (JCAF) is a Java-based context-awareness infrastructure and programming API for creating context-aware applications.
    Downloads: 46 This Week
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  • Save Up to 91% on Cloud Compute With Spot VMs Icon
    Save Up to 91% on Cloud Compute With Spot VMs

    Automatic sustained-use discounts. One free VM per month. No negotiation needed.

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  • 10
    An object oriented OPC client written in C++, implementing the OPC DA specification version 2.05A.
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    Downloads: 13 This Week
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  • 11
    The JWA library aims to provide a conversion from C to Delphi of as many headers as possible from the PSDK etc. The JWSCL (security library) is an advanced object-oriented framework for programming with the Windows security features (ACL, Tokens, etc.)
    Downloads: 10 This Week
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  • 12
    A framework for accessing the Windows Shell Namespace from .Net. Provides controls to enable embedding Windows Explorer-like functionality into .Net programs and for creating custom file dialogs.
    Downloads: 7 This Week
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  • 13
    JActor

    JActor

    High Performance, Lock Free Java Actors

    JActor is a high-performance actor framework designed to make vertical scalability easy. JActor achieves its speed, in part, by almost always executing synchronously--though it is easy enough to force asynchronous processing when needed. JActor is divided into several GitHub projects: JActor - https://github.com/laforge49/JActor JID - https://github.com/laforge49/JID JFile - https://github.com/laforge49/JFile JANetty - https://github.com/kumarshantanu/JANetty
    Downloads: 26 This Week
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  • 14
    The Harmoni PHP Project consists of three major components: 1) A PHP application framework and architecture, offering, e.g. authentication, DBC, file storage 2) PHP OKI OSID (service definitions) conversion system 3) PHP implementations of those OSIDs
    Downloads: 24 This Week
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  • 15
    PHPWebBuilder is a PHP framework designed following well-known object oriented designs and principles featuring a highly reusable components architecture, metadata based persistence and traditional GUI style programming support.
    Downloads: 24 This Week
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  • 16
    Asphyre

    Asphyre

    Asphyre is a cross-platform framework for Delphi and FreePascal.

    Asphyre, also known as Platform eXtended Library, is a cross-platform framework for developing video games and scientific applications in Delphi, and FreePascal/Lazarus. The framework provides facilities for real-time rendering of graphics (using DirectX, OpenGL or Software Renderer), text output, mathematics (including vectors and matrices) and networking communication, among other features. It also supports singleboard devices such as Raspberry PI, Intel Galileo, BeagleBone Black and others with features like GPIO, SPI, I2C and so on, along with external displays, sensors and other peripheral devices.
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    Downloads: 10 This Week
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  • 17
    Nana C++ Library

    Nana C++ Library

    A modern C++ GUI library

    Nana C++ Library takes aim at easy-to-use and portable library, it provides a GUI framework and threads for easy programming with modern C++ methods, such as traits, metaprogramming and other template technologies. Documentation http://nanapro.org/en-us/documentation Feel free to report a bug at https://github.com/cnjinhao/nana/issues
    Downloads: 3 This Week
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  • 18
    Strasheela is a constraint-based music composition system. The user defines music theories by sets of compositional rules and the system creates music which complies with these theories. User-interface is the programming language Oz.
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    Downloads: 16 This Week
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  • 19
    Prosper is a web application development framework to augment Prolog applications with a web interface. It supports control flow in visual logic and promotes a clear separation of model from view.
    Downloads: 15 This Week
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  • 20
    LOVE is a free 2D game engine which enables easy game creation in Lua.
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    Downloads: 8 This Week
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  • 21
    A Perl library providing some useful functions, especially for CGI
    Downloads: 14 This Week
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  • 22
    PHPWebThings is an open-source PHP application framework and content management system for building web portals, online communities, and database-driven websites. Originally developed between 2001 and 2006, with releases through version 1.5.2, the project was revived in 2026 with PHPWebThings 2.0.0. Version 2.0.0 modernizes PHPWebThings for current PHP and MySQL environments with PDO support, enhanced security, improved reliability, and a better installation experience—while intentionally preserving its modular design, classic appearance, and familiar look and feel.
    Downloads: 13 This Week
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  • 23
    Castle aspires to simplify the development of enterprise and web applications. Offering a set of tools (working together or indepedently) and integration with other open source projects, Castle helps you get more done with less code.
    Downloads: 2 This Week
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  • 24
    Spring Layout is a Spring MVC extension and Tag Library which simplifies development of data-centric web applications. It provides rich declarative validation with tag integration, page/field level security & multi-panel/wizard style controllers & forms.
    Downloads: 11 This Week
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  • 25
    Icarus Scene Engine

    Icarus Scene Engine

    3D .NET engine for Windows, Linux, Mac

    Icarus Scene Engine is a cross-platform, CLS-compliant 3D framework, integrating open source APIs into a cohesive all-open-source, all .NET solution. For Windows, MacOSX & Linux. Uses OpenTK, OpenGL, OpenAL APIs for graphics and audio. Runs on Mono/.NET. Links to FFMpeg for streaming video, and FreeType as a temporary conversion mod to bring fonts into a native XML format. Binary builds of Icarus will be infrequent, roughly every 18 months or so, the GIT code updates regularly on a weekly or twice-weekly basis (or faster if there are urgent issues).
    Downloads: 10 This Week
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