Browse free open source C# Internet Software and projects below. Use the toggles on the left to filter open source C# Internet Software by OS, license, language, programming language, and project status.

  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

    Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
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  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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  • 1
    KeePass

    KeePass

    A lightweight and easy-to-use password manager

    KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.
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    Downloads: 205,807 This Week
    Last Update:
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  • 2
    FCKeditor

    FCKeditor

    FCKeditor (retired)

    FCKeditor is the previous version of CKEditor and has been discontinued after version 2. The new CKEditor is redesigned from the ground up, offering more WYSIWYG text editing features, enhanced security and better integration. Don’t force yourself with retro FCKeditor. Switch to the new, cool CKEditor at ckeditor.com
    Downloads: 52 This Week
    Last Update:
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  • 3
    Favorites Organizer
    Organize your favorites and/or bookmarks. https://favoriteorg.svn.sourceforge.net/svnroot/favoriteorg/trunk/
    Downloads: 2 This Week
    Last Update:
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  • 4
    We provide a Hebrew version of Mozilla Firefox, Mozilla Thunderbird, SeaMonkey and Mozilla Application Suite. SeaMonkey/Mozilla Suite are also available for download from here, while the latest Firefox & Thunderbird are available only from mozilla.com.
    Downloads: 2 This Week
    Last Update:
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  • Paessler: Easy to Use With Enterprise Power. Free Trial Icon
    Paessler: Easy to Use With Enterprise Power. Free Trial

    A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.

    You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
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  • 5
    Angosso

    Angosso

    Performance and stability

    Develop: domain secure, and performing secure Domain Name System (DNS) dynamic updates. Domain Name System Security Extensions Servlet API Package The javax.servlet.http package contains a number of classes and interfaces that describe and define the contracts between a servlet class running under the HTTP protocol and the runtime environment provided for an instance of such a class by a conforming servlet container.
    Downloads: 0 This Week
    Last Update:
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  • 6
    The Official port of the STUNNING! CMS/CMFx "Drupal" to the .NET Framework. Combining The greatest open source CMS with the greatest development platform. It will have the same architecture and will support Drupal modules & themes out of the box.
    Downloads: 0 This Week
    Last Update:
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  • 7
    Full-featured, fully customizable, multilingual, skinable, multi-document web based WYSIWYG HTML editor control. Microsoft Internet Explorer, Gecko based browsers (Firefox, Netscape, Mozilla) and Opera 9 are supported.
    Downloads: 0 This Week
    Last Update:
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  • 8
    VCD-db is an web based movie catalog software. It supports multiple users to collect, manage and work with their media catalog. New movies can easily be added through several methods, for example by fetching data straight from websites such as imdb.com
    Downloads: 0 This Week
    Last Update:
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