Open Source C# Internet Software
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C# Internet Software
View 9146 business solutionsBrowse 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.
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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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Safe Exam Browser is a webbrowser-environment to carry out online-exams safely. The software changes any computer into a secure workstation. It regulates the access to any utilities and prevents students from using unauthorised resources.
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v2rayN
A V2Ray GUI client for Windows, Linux and macOS
A V2Ray client for Windows, Linux and macOS, supports Xray core and v2fly core. If you are new to this, please download v2rayN-Core.zip from releases. Otherwise please download v2rayN.zip (you will also need to download v2ray core into the same folder with v2rayN.exe) Run v2rayN.exe. -
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Proton VPN Windows App
Official ProtonVPN Windows app
The ProtonVPN Windows app project hosts the official open-source client software that lets users securely connect their Windows machines to the ProtonVPN service with full system-wide VPN protection. It includes a modern GUI built with .NET and WPF that lets users authenticate, choose VPN servers, and configure features like split tunneling or kill switch, while a background Windows service manages VPN connections using the OpenVPN protocol and handles networking tasks such as firewall and adapter configuration. The app integrates a custom TAP driver and a split tunnel callout driver to help route traffic securely and prevent leaks, and is structured so the GUI and service components work together to deliver a smooth user experience on Windows desktops and laptops. ProtonVPN’s Windows client supports both free and paid users with access to Proton’s global server network, encrypted tunnels, and privacy-first policies that block logging and respect user anonymity. -
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TunMod VPN Client
TunMod VPN Client
TunMod VPN Client is a Windows App designed for secure VPN tunneling and seamless server connections. Featuring Payload Generator, SSH Client, SSL/TLS Tunneling, and multi-profile management, it allows for customized, encrypted connections. TunMod also supports V2Ray, Xray, and XTLS protocols,l2tp,PPTP,HTTPS,OpenVPN, making it a comprehensive solution for advanced tunneling needs. Any suggestions or bug reports: tunmodsupp@gmail.com https://github.com/TunMod/TunMod-VPN-Client -
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netch
A simple proxy client
Netch is an open-source Windows proxy client written in C#, designed for both gaming and general web acceleration. It supports various proxy protocols—Socks5, Shadowsocks, ShadowsocksR, Trojan, VMess, VLESS—and multiple operation modes including process-level interception, shared network, tun/tap virtual adapters, and web proxy. Extensively configurable, it’s ideal for users managing traffic routing per application. -
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Selenium
Browser automation framework and ecosystem
Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily it is for automating web applications for testing purposes, but is certainly not limited to just that. Boring web-based administration tasks can (and should) also be automated as well. If you want to create robust, browser-based regression automation suites and tests, scale and distribute scripts across many environments, then you want to use Selenium WebDriver, a collection of language specific bindings to drive a browser - the way it is meant to be driven. If you want to create quick bug reproduction scripts, create scripts to aid in automation-aided exploratory testing, then you want to use Selenium IDE; a Chrome and Firefox add-on that will do simple record-and-playback of interactions with the browser. If you want to scale by distributing and running tests on several machines and manage multiple environments from a central point. -
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Jackett
API Support for your favorite torrent trackers
Jackett works as a proxy server, it translates queries from apps (Sonarr, Radarr, SickRage, CouchPotato, Mylar3, Lidarr, DuckieTV, qBittorrent, Nefarious, etc.) into tracker-site-specific HTTP queries, parses the HTML or JSON response, and then sends results back to the requesting software. This allows for getting recent uploads (like RSS) and performing searches. Jackett is a single repository of maintained indexer scraping & translation logic, removing the burden from other apps. Trackers marked with (invite needed) have no active maintainer and may be missing features or be broken. If your client supports multiple feeds it's recommended to add each indexer directly instead of using all indexers. Using the all indexer has no advantages (besides reduced management overhead). We recommend you install Jackett as a Windows service using the supplied installer. You may also download the zipped version if you would like to configure everything manually. -
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EverythingToolbar
Everything integration for the Windows taskbar
EverythingToolbar is an open-source Windows utility that integrates Voidtools’ “Everything” file search directly into the Windows taskbar search bar. It mimics the look and feel of Windows 10/11 search and offers seamless real‑time file search powered by Everything. EverythingToolbar includes common search filters out of the box. For advanced users, it can synchronize with Everything's custom filters, giving you complete control over your search experience. Enable this feature by checking Use Everything filters in the EverythingToolbar's Filters settings. Easily toggle search flags (match case, whole word, match path, and regex) to find your files with precision. Create custom Open with actions by navigating to Settings → Custom actions. Enable Automatically apply rules based on condition to execute commands automatically based on file type and regular expressions. Leave the regex field empty to display the action only in the context menu. -
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Service Bus Explorer
Connect to a Service Bus namespace and administer messaging entities
The Service Bus Explorer allows users to connect to a Service Bus namespace and administer messaging entities in an easy manner. The tool provides advanced features like import/export functionality or the ability to test topics, queues, subscriptions, relay services, notification hubs, and events hubs. Microsoft Azure Service Bus is a reliable information delivery service. The purpose of this service is to make communication easier. When two or more parties want to exchange information, they need a communication facilitator. Service Bus is a brokered, or third-party communication mechanism. This is similar to postal service in the physical world. Postal services make it very easy to send different kinds of letters and packages with a variety of delivery guarantees, anywhere in the world. The Service Bus Explorer 2.1.0 can be used with the Service Bus for Windows Server 1.1. The Service Bus Explorer 2.1.0 uses a version of the Microsoft.ServiceBus.dll client library. -
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Simple DNSCrypt
A simple management tool for dnscrypt-proxy
SimpleDnsCrypt is a user-friendly graphical interface for dnscrypt-proxy, designed to make encrypted DNS resolution simple and accessible for Windows users who want to improve their privacy and security without delving into complex command-line tools. It provides an intuitive control panel where individuals can enable DNS encryption (such as DNS-over-HTTPS or DNS-over-TLS), select trusted resolvers, and configure advanced options like upstream resolver lists, fallback settings, and filtering rules. By abstracting the complexity of DNS encryption setup, SimpleDnsCrypt helps protect users from ISP tracking, DNS spoofing, and on-path attacks that intercept or tamper with standard DNS lookups. The project also includes handy features like automatic service installation, status monitoring, log viewing, and resolver health checks, making it easier to diagnose connection issues or ensure the encrypted DNS chain remains operational. -
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GO Contact Sync Mod
Sync Outlook contacts and calendars with Google
Please install the latest version >4.0, because it uses the new Google People API. The Google Contacts API is now deprecated and is scheduled for sunset on June 15, 2021. GO Contact Sync Mod synchronizes your Microsoft Outlook contacts with your Google Mail address book, including pictures, categories and contact notes. It also syncs your Outlook Calendar Appointments on demand to Google Calendar. This Mod fork adds many enhancements and bug fixes to the obviously dead project 'Go Contact Sync'. Minimum requirement for GO Contact Sync Mod is .NET 4.7.2 and Windows 7 (32 or 64 bit). -
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CefSharp
.NET bindings for the Chromium embedded framework
CefSharp is an easy way to embed a full-featured standards-compliant web browser into your C# or VB.NET app. CefSharp has browser controls for WinForms and WPF apps, and a headless (offscreen) version for automation projects too. CefSharp is based on Chromium Embedded Framework, the open source version of Google Chrome. CefSharp embraces modern web standards, and supports HTML5, JavaScript, CSS3 and HTML5 audio/video elements. 3D content is supported via WebGL which uses OpenGL/DirectX for hardware accelerated rendering. CefSharp includes embedded modules for PDF, web page printing and the WebKit Inspector (developer tools). CefSharp has no external dependencies, and the full build of CefSharp only adds ~80 MB to your app. See the CefSharp.MinimalExample project for ready-to-compile minimal example apps built with CefSharp. Within the projects source there are more complicated example projects. -
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Safe Exam Browser Patch
Bypass Safe Exam Browser restrictions
This project is a bypass of Safe Exam Browser to allow users to exit the exam screen. -
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Titanium Web Proxy
A cross-platform asynchronous HTTP(S) proxy server in C#
A lightweight HTTP(S) proxy server written in C#. For programming help use StackOverflow with the tag Titanium-Web-Proxy. API Documentation and Wiki/Contribution guidelines. Multithreaded and asynchronous proxy employing server connection pooling, certificate cache, and buffer pooling. View, modify, redirect and block requests or responses. Supports mutual SSL authentication, proxy authentication & automatic upstream proxy detection. Supports kerberos, NTLM authentication over HTTP protocols on Windows domain-controlled networks. SOCKS4/5 Proxy support. Refer the HTTP Proxy Server library in your project and look up the test project to learn usage. -
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V2ray Config Pool - Free VPN Config
Multi-Protocol VPN Configuration Manager
V2ray Config Pool - Multi-Protocol Free VPN Configuration Manager Configs are updated every hour from various sources Description: V2ray Config Pool is a free Windows application designed for users who need seamless access to global VPN configurations. This powerful tool collects and organizes a wide range of protocols, including VMess, VLESS, Trojan, HTTPS, Shadowsocks, and WireGuard, from over 60 countries based on IPs and locations. Whether you are a VPN enthusiast or a professional looking to optimize your network, V2ray Config Pool makes it easy to find and use configurations tailored to your needs. Key features include: * Global Database: Access a rich pool of configurations and subscriptions from 60+ countries. * Wide Protocol Support: Manage VMess, VLESS, Trojan, Shadowsocks, WireGuard, and more in one place. * Optimized for Performance: Ensure secure, fast, and reliable connections. Empower your networking experience with V2ray Config Pool—a comprehe -
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Wg Server for Windows
Wg Server for Windows (WS4W) is a desktop application
WgServer for Windows, also known as WS4W, is a Windows desktop application for running and managing a WireGuard server endpoint. It was created to simplify the process of setting up WireGuard on Windows without requiring users to manually edit the registry, run scripts, or configure every networking step through Control Panel. The application can install WireGuard for Windows, generate or accept server keys, create server configuration files, and help manage the Windows networking pieces needed for internet sharing. It is designed for Windows Server and Windows desktop environments where a graphical setup flow is preferred over command-line configuration. The tool still requires users to handle network realities such as router port forwarding, but it reduces much of the local setup friction. It is especially useful for small Windows-based VPN deployments that need WireGuard server management without moving to Linux. -
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Virto Commerce Platform
VirtoCommerce Platform repository
A unique, highly tailored customer experience (CX) might become a significant advantage to beating any competitor, even with a larger market presence and budget. Choose Virto Commerce's headless, API-driven platform to build such a unique CX. Entrepreneurs ourselves, we constantly develop our .NET Core platform offering the flexibility, scalability, and agility for building new revenue sources like online stores, B2B portals, multi-vendor portals, mobile apps, chatbots or any other touchpoints. Use Virto Commerce B2B eCommerce platform as a transformational force to reimagine how to do business, identify new markets and deploy resources more efficiently for higher ROI. Strive for online business when you win while the client wins as well. Worldwide network of certified implementation partners & solution partners to fit every project. Build a B2B channel with complicated business logic on top of your e-commerce solution without re-platforming or data duplication. -
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A KeePass plugin that downloads and stores favicons. A favicon is the little icon / logo used to identify many websites, typically displayed in the browser's address bar, bookmark list and on tabs.
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AutoWikiBrowser is a semi-automated Wikipedia editor, designed to make tedious, repetitive tasks quicker and easier. For more information, see the project homepage at http://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser.
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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 -
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File Tunnel
Tunnel TCP connections through a file
File-Tunnel is a tunneling tool that moves TCP connections through a shared file or file server. It is built around the unusual idea that two systems can exchange network data by reading and writing files that both sides can access. This makes it useful in environments where direct TCP connectivity is blocked but a shared folder, FTP server, S3-compatible storage, Dropbox folder, RDP drive share, or similar file channel is available. The project provides portable executables for Windows, Linux, and macOS, which makes it practical for cross-platform testing. Its documentation includes examples for bypassing firewall limitations, tunneling through FTP, using remote internet access, and routing through remote desktop file shares. File-Tunnel is best understood as a specialized connectivity workaround for controlled environments where file access exists but normal network routing does not. -
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Mirror
#1 Open Source Unity Networking Library
Mirror is a high-level open-source networking library for Unity multiplayer games. It was originally based on UNET and has evolved into a stable, modular framework used by many production Unity projects. The library is designed to make multiplayer development easier by handling common networking patterns such as network identities, synchronization, remote procedure calls, authority, spawning, and transport integration. Mirror supports multiple low-level transports, making it adaptable to different game genres and deployment needs. It is suitable for small multiplayer games, cooperative games, competitive prototypes, and even larger persistent-world or MMORPG-style projects. The project is especially useful for Unity developers who want a mature networking layer without building protocol and synchronization systems from scratch. -
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ConcatPDF
PDF Concatenation Tool
ConcatPDF is the tool to concatenate PDF files. It can concatenate, extract, encrypt, decrypt, configure PDF files, convert image files to PDF. GUI version and CUI version are both available. iText.NET is iText porting on .NET Framework by J#. This library allows you to generate PDF, (X)HTML, XML, RTF files on Microsoft.NET Framework including ASP.NET. -
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Coffee will keep your computer wide awake while your downloads or network transfers complete. Coffee prevents standby when your traffic speed on a selected network adapter is above the user configurable threshold. [Licence is GPLv3] as at bitcoin block (0000000000000000001b34dafd32802dd18c0303c73b2af6b1969be7c9bbccbe)
