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

  • Ship Agents Faster Icon
    Ship Agents Faster

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    Paessler - Monitor Your Whole Network in Minutes

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  • 1
    VSCodium

    VSCodium

    binary releases of VS Code without MS branding/telemetry/licensing

    Microsoft’s vscode source code is open source (MIT-licensed), but the product available for download (Visual Studio Code) is licensed under this not-FLOSS license and contains telemetry/tracking. The VSCodium project exists so that you don’t have to download+build from source. This project includes special build scripts that clone Microsoft’s vscode repo, run the build commands, and upload the resulting binaries for you to GitHub releases. These binaries are licensed under the MIT license. Telemetry is disabled. If you want to build from source yourself, head over to Microsoft’s vscode repo and follow their instructions. VSCodium exists to make it easier to get the latest version of MIT-licensed VSCode. Please note that some Visual Studio Code extensions have licenses that restrict their use to the official Visual Studio Code builds and therefore do not work with VSCodium.
    Downloads: 105 This Week
    Last Update:
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  • 2
    Virastyar

    Virastyar

    Virastyar is an spell checker for low-resource languages

    Virastyar is a free and open-source (FOSS) spell checker. It stands upon the shoulders of many free/libre/open-source (FLOSS) libraries developed for processing low-resource languages, especially Persian and RTL languages Publications: Kashefi, O., Nasri, M., & Kanani, K. (2010). Towards Automatic Persian Spell Checking. SCICT. Kashefi, O., Sharifi, M., & Minaie, B. (2013). A novel string distance metric for ranking Persian respelling suggestions. Natural Language Engineering, 19(2), 259-284. Rasooli, M. S., Kahefi, O., & Minaei-Bidgoli, B. (2011). Effect of adaptive spell checking in Persian. In NLP-KE Contributors: Omid Kashefi Azadeh Zamanifar Masoumeh Mashaiekhi Meisam Pourafzal Reza Refaei Mohammad Hedayati Kamiar Kanani Mehrdad Senobari Sina Iravanin Mohammad Sadegh Rasooli Mohsen Hoseinalizadeh Mitra Nasri Alireza Dehlaghi Fatemeh Ahmadi Neda PourMorteza
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    Downloads: 246 This Week
    Last Update:
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  • 3
    SourceCookifier: Plugin for Notepad++
    A plugin which uses Exuberant Ctags to parse either only the currently activated source file or multiple files of so-called sessions. The results are shown and can be browsed in a treeview inside of a dockable window.
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    Downloads: 219 This Week
    Last Update:
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  • 4
    Notepads

    Notepads

    A modern, lightweight text editor with a minimalist design

    I have been waiting long enough for a modern Windows 10 notepad app to come before I decided to create one myself. Don’t get me wrong, Notepad++, VS Code, and Sublime are great text editors. I have used them all and I will continue to use them in the future. However, they are either too heavy or look less appealing. There are times that I just wanted to use Windows Notepad for things like writing notes or editing config files. So I decided to create a win32 notepad replacement here and try to give it a modern look and feel. Most importantly, it has to be blazingly fast and appeal to everyone.
    Downloads: 25 This Week
    Last Update:
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  • Cut Data Warehouse Costs by 54% Icon
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  • 5
    OneNote Md Exporter

    OneNote Md Exporter

    ConsoleApp to export OneNote notebooks to Markdown formats

    OneNote Md Exporter is a console application running on Windows that exports your OneNote notebooks in different markdown formats. Evaluate or migrate to an alternative Knowledge Management Software like Joplin, Obsidian or other software based on Markdown format. Backup your OneNote Notebooks in an interoperable and open file format.
    Downloads: 20 This Week
    Last Update:
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  • 6
    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: 42 This Week
    Last Update:
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  • 7
    AutoText

    AutoText

    Text expander(auto-type) application

    AutoText is a text expander(auto-typer) application that can minimize time that you spent typing phrases that your often use. You can bind an abbreviation(autotext) to some text snippet, phrase or sentence and that text will be automatically typed by AutoText each time you type the abbreviation. Keyboard keys press/hold/toggle is supported by using macros. AutoText works in any Windows program.
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    Downloads: 81 This Week
    Last Update:
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  • 8
    The goal for this project is to provide translators to allow for interoperability between applications based on ODF (OpenDocument) 1.1 standards and ECMA Office OpenXML based Office applications.
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    Downloads: 35 This Week
    Last Update:
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  • 9
    LMG2Shruti is a free non unicode to unicode font converter. It converts the LMG Arun font to Gujarati unicode Shruti font.
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    Downloads: 91 This Week
    Last Update:
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  • Endpoint Management with Remote Control Built In Icon
    Endpoint Management with Remote Control Built In

    Patch, monitor, and connect to Windows and macOS devices from one console

    Splashtop AEM handles patching, alerts, scripts, and inventory, and unattended remote control is included. When something needs hands-on work, you’re one click away instead of switching tools.
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  • 10
    Markdown Monster

    Markdown Monster

    An extensible Markdown Editor, Viewer and Weblog Publisher for Windows

    Markdown Monster is a powerful, yet easy-to-use Markdown editor with syntax highlighting and sophisticated and fast edit features. A collapsible, synced, live preview lets you see your output as you type and scroll. Easily embed or paste images, links, tables and code using raw markup or our smart UI helpers to simplify many operations with a few keystrokes or a click or two. Paste images from the clipboard or drag and drop from Explorer or our built-in file browser. Inline spell-checking and word counts keep your content streamlined. You can export Markdown to PDF or HTML on disk or copy Markdown selections as HTML to the clipboard. The HTML preview can display syntax-colored code snippets for most coding languages. Choose from light or dark app themes, and individual and fully customizable preview themes. Use the built-in folder browser to open, manage and drag files into content, use the document outline to quickly jump through content, or use our shell integration.
    Downloads: 6 This Week
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  • 11

    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.
    Downloads: 35 This Week
    Last Update:
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  • 12
    The goal of this tool is to simplify and accelerate the process of creating bookmarks for DjVu and PDF documents. You can see additional information on the project page.
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    Downloads: 25 This Week
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  • 13
    CSV Quick Viewer

    CSV Quick Viewer

    CSV Quick Viewer

    CSVQuickViewer is a Windows application for viewing and analyzing delimited text files. It supports CSV, tab-delimited, pipe-delimited, and other custom formats, automatically detecting delimiters, encoding, quoting, and escaping. The application handles malformed or inconsistent files, skips headers and comments, and highlights problematic data. Users can switch between typed and text values, realign columns automatically, filter, sort, hide, and reorder columns, and copy data to Excel or Word with value types preserved. Compressed files in ZIP and GZip formats can be opened directly. CSVQuickViewer runs without administrative rights, provides column insights, and allows exporting filtered data, offering a fast, reliable, and local solution for inspecting structured text data. Ideal for analysts, developers, and support teams working with large or messy data files.
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    Downloads: 25 This Week
    Last Update:
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  • 14
    AvalonEdit

    AvalonEdit

    The WPF-based text editor component used in SharpDevelop

    AvalonEdit is the name of the WPF-based text editor in SharpDevelop 4.x "Mirador" and beyond. It is also being used in ILSpy and many other projects. AvalonEdit is targeting net6.0-windows and net462 TFMs. Because of net6.0-windows, you must have the .NET 6.0 SDK installed on your machine. Visual Studio 2022 Community and up is required for working with the solution (global.json will select the proper SDK to use for building for you).
    Downloads: 2 This Week
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  • 15
    Notepad X
    Notepad X is an alternative open source text editor for Microsoft Windows, with a lot of customization options created to help users managing text documents featuring tab navigation.
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    Downloads: 17 This Week
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  • 16
    PDF Clown

    PDF Clown

    General-Purpose PDF Library for Java and .NET

    PDF Clown is a general-purpose Java and .NET library for manipulating PDF files through multiple abstraction layers, rigorously adhering to PDF 1.7 specification (ISO 32000-1). This project aims to provide a universal access to PDF files (creation, reading, editing, rendering...) through an accurate and elegant object-oriented API. * Features: http://pdfclown.org/overview/features/ * Overview: http://pdfclown.org/overview/architecture/ * Website: http://pdfclown.org/ * Blog: http://www.pdfclown.org/blog/ * Twitter: https://twitter.com/PDFClown
    Downloads: 10 This Week
    Last Update:
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  • 17
    Unicode Converter

    Unicode Converter

    All in one Text, Decimal, and Unicode Converter as you type.

    Unicode Converter is an open source software for converting Text to Unicode and decimal and vice versa while you type. No clicks or convert button! Latest source code: https://github.com/ahmed-fathy/unicode-converter Conversion Options: Text -> Unicode and Decimal Unicode -> Text and Decimal Decimal -> Text and Unicode *Smart settings: The settings take effect directly after you change it and will be saved for you and applied in next runs. Formatting options: Unicode and decimal perfix and postfix to get your desired output, such as \u0001  0001 etc...
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    Downloads: 35 This Week
    Last Update:
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  • 18
    Arcanum Editor
    The Arcanum Editor is a small but powerful tool to encrypt and decrypt messages. The program also comes with it's own format CTXT. This format is based on XML and allows you to save texts with the Advanced Encryption Standard.
    Downloads: 30 This Week
    Last Update:
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  • 19
    The Punjabi Computing Resource Centre holds resources (specifically articles, programs and fonts) to support the use of the Punjabi language using Unicode Gurmukhi. It also hosts a forum for language debate and technical support.
    Downloads: 30 This Week
    Last Update:
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  • 20
    TouchPad Handwriting

    TouchPad Handwriting

    Handwriting recognition on a notebook computer.

    With the Tablet PC components of Windows and the API provided by Synaptics touchpad driver, we can easily perform handwriting recognition on a notebook computer.
    Downloads: 16 This Week
    Last Update:
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  • 21
    chmProcessor: Word/HTML to CHM converter

    chmProcessor: Word/HTML to CHM converter

    MS Word / HTML to CHM / Web Help converter

    A tool to generate compiled help files (CHM) and Java Help files from MS Word or HTML files. It splits the document on different topics pages by the "titles" sections. It can too generate a web site, a PDF and a XPS with the help content.
    Downloads: 7 This Week
    Last Update:
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  • 22
    Chuletas / Cribr

    Chuletas / Cribr

    A powerful text processor to make cheat sheets easily

    A powerful text processor to make cheat sheets in an easy and suitable way. Text compressor, interface based in Office 2010, equation editor, real time previw & spell checker.... are some of its features. In addition, it can also works as a normal text editor, putting at your fingertips all the power of a great text editor comparable to Microsoft Word or LibreOffice, but with a much lighter installation and free of charge. In spanish speaking countries is known as Chuletas, the spanish translation of cheat sheet. In the rest of the world it's known as Cribr (from crib-sheet).
    Downloads: 8 This Week
    Last Update:
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  • 23
    A transparent notepad programmed in C#. Now with Rich Text Support!
    Downloads: 13 This Week
    Last Update:
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  • 24
    The “Save as DAISY XML” add-in was created through an open source project with Microsoft, Sonata Software Ltd. and the Digital Accessible Information System (DAISY) Consortium and can be downloaded on sourceforge.
    Downloads: 3 This Week
    Last Update:
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  • 25
    Notes Keeper

    Notes Keeper

    A program for saving and organizing notes

    Notes Keeper 5.2.3.0 Don't you like your notes to be saved in the clouds, where you can't control. Do you like to have all your notes with you. Then you need Notes Keeper. A program for saving and organizing notes Notes Keeper will let you create notes, format them in all ways. You can add files, images, text and very basic tables to the notes. Change sentences/words cases and lock them from other people. Organize your notes with folders and tree. After you finish export your note(s) to a text file or rtf file, print it from your printer, or send it as email or attachment to you family or friends. Its free. Not like any other note taking software. feel free to report any bugs .NET 4.6 and Microsoft Visual C++ 2015 Update 3 runtime are needed to run Notes Keeper
    Downloads: 7 This Week
    Last Update:
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