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Open Source C# Communications Software

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

  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
    Sign up for free
  • 1
    Outlook CalDav Synchronizer

    Outlook CalDav Synchronizer

    Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server

    Free Outlook Plugin, which synchronizes events, tasks and contacts between Outlook and Google, SOGo, NextCloud, Horde or any other CalDAV or CardDAV server. Supported Outlook versions are 2021, 2019, 2016, 2013, 2010 and 2007 and Office 365 for Desktop. This project was initially developed as a master thesis project at the University of Applied Sciences Technikum Wien, Software Engineering Degree program. Outlook CalDav Synchronizer is Free and Open-Source Software (FOSS), still you can support the project by donating on Sourceforge or directly within the About dialog of our Plugin. Contact us for enterprise support at https://caldavsynchronizer.org/enterprise/contact
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    Downloads: 840 This Week
    Last Update:
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  • 2
    SparkleShare

    SparkleShare

    Share and collaborate by syncing with any Git repository

    SparkleShare creates a special folder on your computer. You can add remotely hosted folders (or "projects") to this folder. These projects will be automatically kept in sync with both the host and all of your peers when someone adds, removes or edits a file. SparkleShare was made to cover certain use cases, but doesn't handle every scenario well. SparkleShare uses the version control system Git under the hood, so setting up a host yourself is relatively easy. Using your own host gives you more privacy and control, as well as lots of cheap storage space and higher transfer speeds. The idea of SparkleShare sprouted at the GNOME Usability Hackfest in London, where a couple of designers came to the conclusion that they didn't have a good (Open Source) collaboration tool to share their work.
    Downloads: 1 This Week
    Last Update:
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  • 3
    It is an email sender. This software can send your mass marketing bulk email to unlimited mailing list. The program can send via SMTP server, MAPI, or delivers e-mail directly without ISP's mail system. Also includes flexible address filters and rules.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 4
    VMukti open source is leading Asterisk/ Yate enabled p2p Video IP Communications Suite for Web / PSTN. These serverless broadband ready platform enable OS community to save 90% on capital & operating costs over proprietary software for conferencing &
    Downloads: 2 This Week
    Last Update:
    See Project
  • ManageEngine Endpoint Central for IT Professionals Icon
    ManageEngine Endpoint Central for IT Professionals

    A one-stop Unified Endpoint Management (UEM) solution

    ManageEngine's Endpoint Central is a Unified Endpoint Management Solution, that takes care of enterprise mobility management (including all features of mobile application management and mobile device management), as well as client management for a diversified range of endpoints - mobile devices, laptops, computers, tablets, server machines etc. With ManageEngine Endpoint Central, users can automate their regular desktop management routines like distributing software, installing patches, managing IT assets, imaging and deploying OS, and more.
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  • 5
    Lotus Notes to Google Calendar tool

    Lotus Notes to Google Calendar tool

    One-way synchronization from Lotus Notes Calendar to Google Calendar

    This is a one-way sync program that will sync your Lotus Notes Calendar to your Google Calendar. No installation is required. Includes many options such as automatic syncing at specified intervals. *Important Privacy Information: https://sourceforge.net/p/lntogoogle/wiki/PrivacyPolicy/ *** Information Update, September 2020: *** Recent issues with Google Synchronization should be fixed with version 1.9.2 which is available for download, now. For typical installation pitfalls, see: https://sourceforge.net/p/lntogoogle/wiki/InstallationPitfalls/ The project was not maintained since its last update in February 2015. However, since I've tracked more than 15.000 Downloads over the last 5 years and still more than 1 million Calendar API-Calls per day, I assume that the tool is still very much in use. So I decided to go back to work. More info: https://sourceforge.net/p/lntogoogle/wiki/Home/ Donations appreciated
    Downloads: 1 This Week
    Last Update:
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  • 6
    JAVT - Just Another Voice Transformer

    JAVT - Just Another Voice Transformer

    Just Another Speech Recognition and Text to Speech software.

    JAVT or Just Another Voice Transformer (formerly, it is called Just Another Video Transcriber) is a Speech Recognition software that also support text to Speech and simple media conversion. JAVT allows you to convert from video files to audio wav file using ffmpeg, and then transcribe the audio file to text using either Microsoft SAPI or CMU Sphinx. You can also open a text file and allow JAVT to read it out for you through text to speech conversion.
    Downloads: 6 This Week
    Last Update:
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  • 7
    SIM Manager

    SIM Manager

    SIM Card management tool for prepaid and contract SIM Cards

    Manage all your SIM cards in one place. Prepaid or Contract SIM cards and devices. Schedule notifications via SMS or Email for free using the Google Calendar. Make it easy to keep all of your devices online all the time.
    Downloads: 5 This Week
    Last Update:
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  • 8
    FreeMiCal allows the bulk export of MS Outlook appointment items to RFC 2445 conformant iCal format. .NET 2.0 or greater and Outlook 2003 or 2007 Interop Services required.
    Downloads: 3 This Week
    Last Update:
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  • 9
    FreeForm is a business form management system, which affords users to design and fill rich script-enabled forms. Form engine is XML/XSLT-based. The project assumes basic concepts of InfoPath, .NET technology and new ideas. See home page for more details.
    Downloads: 2 This Week
    Last Update:
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  • The top-rated AI recruiting platform for faster, smarter hiring. Icon
    The top-rated AI recruiting platform for faster, smarter hiring.

    Humanly is an AI recruiting platform that automates candidate conversations, screening, and scheduling.

    Humanly is an AI-first recruiting platform that helps talent teams hire in days, not months—without adding headcount. Our intuitive CRM pairs with powerful agentic AI to engage and screen every candidate instantly, surfacing top talent fast. Built on insights from over 4 million candidate interactions, Humanly delivers speed, structure, and consistency at scale—engaging 100% of interested candidates and driving pipeline growth through targeted outreach and smart re-engagement. We integrate seamlessly with all major ATSs to reduce manual work, improve data flow, and enhance recruiter efficiency and candidate experience. Independent audits ensure our AI remains fair and bias-free, so you can hire confidently.
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  • 10
    SistemaCams

    SistemaCams

    Software de Videovigilância Free

    O SistemaCams é um software de videovigilância gratuito, que incorpora o sistema de detecção de movimentos da livraria Aforge.net. Este software aceita mais do que uma webcam ligada em simultâneo e com uma vasta gama de opções completamente gratuitas.
    Downloads: 1 This Week
    Last Update:
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  • 11
    mSeller is a mobile application for concluding agreements, keeping info about clients and goods. Program is targeting Windows Mobile 6 and may be useful for various business fields. Written using C#, .Net Compact Framework 3.5 and SQL Server Compact.
    Downloads: 1 This Week
    Last Update:
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  • 12
    Next generation web-based, multi-tenant, distributed, mulit-lingual, inbound, outbound Video enabled VoIP & VVoIP call/ contact center solution for Asterisk with Built-in phone, IVR, CRM, Predictive dialer, ACD, Chat, Mail, Fax, Video and other features.
    Downloads: 0 This Week
    Last Update:
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  • 13
    Af-Arch is an Open Source N-tier framework to build distribuited applications. Its license schema allows Open Source and commercial (closed source) applications. This is the foundation to build an new set of applications in a fast and reliable way.
    Downloads: 0 This Week
    Last Update:
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  • 14
    AktivHelp Support Desk System is a web-based helpdesk application that allows for the exchange of information between users and their service provider (for example an IT helpdesk and their end-users).
    Downloads: 0 This Week
    Last Update:
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  • 15
    BlazorTable

    BlazorTable

    Blazor Table component with sorting, paging and filtering

    Blazor Table component with sorting, paging and filtering. Provides column reordering features, edit mode, client side, paging and sorting, filtering and much more.
    Downloads: 0 This Week
    Last Update:
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  • 16
    Bluetooth Personal Area Network client (PAN) with Support for RADIUS / Bluetooth Network Access Server (Point) (NAS / NAP) with Radius AAA. Project is supported by Nokia. Target BT stacks MS, Widcomm, BlueZ, Affix Blu(etooth) S(ymbian) PAN
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Bobcat Open Source Software is an umbrella project of a number of open-source software projects developed at Ohio University, including, among others, a distributed process management system, a meeting scheduling tool, and a performance evaluation tool.
    Downloads: 0 This Week
    Last Update:
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  • 18
    This library contains simple methods to interact with a Symbol CS 1504 or an Opticon OPN 2001 barcode reader from .NET 2.0.
    Downloads: 0 This Week
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  • 19
    ClipUpload
    PLEASE NOTE!!! ClipUpload will not be available from SourceForge anymore. RIP, SourceForge. You were once good. Please find our new home of source code on Github: https://github.com/NimbleTools/Clipupload Or on our website: https://nimble.tools/clipupload --- Quickly upload anything thats on your clipboard to the internet. It supports FTP, Imgur.com, Pastebin.com and Dropbox. Usage? Step 1: Copy. Step 2: Right-click system tray icon and pick an upload method. Step 3: Paste public link. The easiest way to share your clipboard!
    Downloads: 0 This Week
    Last Update:
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  • 20
    Contacts Master is a suite of 2 applications, one for Pocket PC`s and one for PC`s which allows you to export, import and edit Pocket Outlook contacts. These contacts can be managed on PC and then updated in PPC.
    Downloads: 0 This Week
    Last Update:
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  • 21

    Cooperative whiteboard

    Lightweight app aimed for allowing users to share strategies on a map.

    This application was originally designed for gamers in specific people who plays games that require team coordination/ cooperative whiteboard can be used to share maps/blueprints and discuss strategies in real time.
    Downloads: 0 This Week
    Last Update:
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  • 22
    DB Web Admin Provides access to your databases through a web interface. It gives users visibility into their SQL Server database instances. DBWA shows users Currently running SQL Queries, Historic Queries, and Fragmented Indexes. DBWA also allows users to kill currently running queries or run their own SQL queries. DBWA is implemented in ASP.NET MVC using C#. Previous Versions supported Oracle(PL/SQL and JSP), MS SQLServer (ASP), and MySQL/ODBC (C#.NET) versions.
    Downloads: 0 This Week
    Last Update:
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  • 23
    Desktop Contacts aims to provide a lightweight, always on top set of tabs at the top of the screen that, when clicked, displays an editable contact list and quick notes. The project is written in VB.Net 2.0 and C# 2.0 (ExtendedRichTextBox control).
    Downloads: 0 This Week
    Last Update:
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  • 24
    DocLib is a Web-based Document Management System implemented in ASP .NET technology to facilitate documents finding in Full Text Search, Directory Browsering, Search by document summary,by Catagory/Attribute , and by Virtual Directory.
    Downloads: 0 This Week
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  • 25
    DocuMania is an easy document management system for handling your scanned-in documents. All additional information is stored within XML-Files and there is no need of a database.
    Downloads: 0 This Week
    Last Update:
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