C# Graphic Design Software

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

  • Our Free Plans just got better! | Auth0 Icon
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  • Context for your AI agents Icon
    Context for your AI agents

    Crawl websites, sync to vector databases, and power RAG applications. Pre-built integrations for LLM pipelines and AI assistants.

    Build data pipelines that feed your AI models and agents without managing infrastructure. Crawl any website, transform content, and push directly to your preferred vector store. Use 10,000+ tools for RAG applications, AI assistants, and real-time knowledge bases. Monitor site changes, trigger workflows on new data, and keep your AIs fed with fresh, structured information. Cloud-native, API-first, and free to start until you need to scale.
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  • 1
    gPhoto
    gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms. GIT repo and Issue tracker lives at https://github.com/gphoto/ these days.
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    Downloads: 2,689 This Week
    Last Update:
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  • 2
    FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!
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    Downloads: 1,928 This Week
    Last Update:
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  • 3

    Developer's Image Library

    A full featured cross-platform image library

    Developer's Image Library (DevIL) is a cross-platform image library utilizing a simple syntax to load, save, convert, manipulate, filter and display a variety of images with ease.
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    Downloads: 432 This Week
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  • 4
    Pinta

    Pinta

    Simple GTK# Paint Program

    Pinta is a free, open-source program for drawing and image editing. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, Windows, and BSD. Use easy drawing tools to draw freehand, lines, rectangles, ellipses, and more. Pinta includes over 35 adjustments and effects for tweaking your images. Use Pinta in your language. Pinta is at least partially translated into over 55 languages. Don't be afraid to experiment, Pinta tracks your full history so you can always undo. Use layers to help separate and group elements of your image for easy editing. Like docked windows? No problem. Floating windows? No problem. You can even mix and match. Original Pinta code is licensed under the MIT License, see license-mit.txt for the MIT License. Code from Paint.Net 3.36 is used under the MIT License and retains the original headers on source files.
    Downloads: 12 This Week
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  • Nonprofit Budgeting Software Icon
    Nonprofit Budgeting Software

    Martus Solutions provides seamless budgeting, reporting, and forecasting tools that integrate with accounting systems for real-time financial insights

    Martus' collaborative and easy-to-use budgeting and reporting platform will save you hundreds of hours each year. It's designed to make the entire budgeting process easier and create unlimited financial transparency.
    Learn More
  • 5
    Flexxi - Batch Image Resizer

    Flexxi - Batch Image Resizer

    Flexxi can resize, compress, rotate, rename, convert images

    Flexxi Image Resizer can resize, rotate, rename and convert images. Imagine if you want to - automatically rotate holiday pictures in portrait format - rename images to the date they were taken to join images from different cameras - same also is posible with a simple counter if you just care about the correct order - resize images and lower the quality to reduce the file size for easier sending them per mail - resize shop images all to the same size with a filling background color to have a common format - convert images in a different file format (e.g. jpg to png with all images the same size and transparent filling background) - open your images in Flexxi just by sending them to the application with the right click menu (send to) - preview changes on the images before appling it - use it in English, German or Spanish and much more is posible with Flexxi. Download on Sourceforge is just the Executable, for self-building: https://github.com/mpointner/FlexxiCS
    Downloads: 61 This Week
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  • 6
    Kavita

    Kavita

    Kavita is a fast, feature rich, cross platform reading server

    Kavita is a fast, feature-rich, cross-platform reading server. Built with a focus on manga and the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family. Lighting fast with a slick design, Kavita is a rocket-fueled self-hosted digital library that supports a vast array of file formats. Install to start reading and share your server with your friends. Quickly resume your reading from your homepage, and get to your reading lists and collections. Serve up Manga/Webtoons/Comics (cbr, cbz, zip/rar, 7zip, raw images) and Books (epub, pdf). First-class responsive readers that work great on any device (phone, tablet, desktop). Dark mode and customizable theming support. Provide hooks into metadata providers to fetch metadata for Comics, Manga, and Books. Metadata should allow for collections, want-to-read integration from 3rd party services, genres. Ability to manage users, access, and ratings.
    Downloads: 8 This Week
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  • 7
    ImageMagick

    ImageMagick

    Display, convert, and edit raster image and vector image files

    ImageMagick® is a free and open-source software suite for displaying, converting, and editing raster image and vector image files. It can read and write over 200 image file formats, and can support a wide range of image manipulation operations, such as resizing, cropping, and color correction. ImageMagick is written in C and is available for a wide range of operating systems, including Linux, macOS, and Windows. It can be used as a standalone application, or as a library that can be integrated into other software programs. Overall, ImageMagick is a powerful and versatile software suite for displaying, converting, and editing image files. Its support for scripting and automation, along with its other features, make it a valuable tool for a wide range of image-related tasks.
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    Downloads: 163 This Week
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  • 8
    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: 3 This Week
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  • 9
    Sniptool - Screen Capture

    Sniptool - Screen Capture

    Powerful Snipping Tool !

    Sniptool is a screen capture tool that lets you capture one or more selected areas on your desktop and save it with optional annotations. You can combine multiple captures into one canvas and add text, arrows, number bullets and shapes to annotate your capture. There is also an option to blur parts of the image for privacy. Your finished screenshot can be saved as JPG, BMP, TIF or PNG file.
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    Downloads: 64 This Week
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  • Cloud-based help desk software with ServoDesk Icon
    Cloud-based help desk software with ServoDesk

    Full access to Enterprise features. No credit card required.

    What if You Could Automate 90% of Your Repetitive Tasks in Under 30 Days? At ServoDesk, we help businesses like yours automate operations with AI, allowing you to cut service times in half and increase productivity by 25% - without hiring more staff.
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  • 10
    Pdf & Djvu Bookmarker is a powerful tool to create and edit outlines in Pdf and DjVu files. It is based on DjVuLibre, iTextSharp and TreeViewAdv for .NET. Adobe Reader X should be installed on target computer. For more info read MediaWiki on Hosted Apps page and manuals (included in installation).
    Downloads: 11 This Week
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  • 11
    pViewer

    pViewer

    pViewer, a small and fast image viewer. Because less is more.

    All image viewers i've ever seen have something on screen other than the image they're displaying. I didn't like that, so, pViewer was born. And that's why everything in pViewer is done with the right click menu and keyboard shortcuts. I also didn't want to use two different viewers for viewing images and for reading comics, and that's why pViewer have a Manga/Comic mode. This project is written in C#, and uses the .NET Framework 4, which you need to run the software: https://www.microsoft.com/en-us/download/details.aspx?id=17851 I strongly suggest to open and read the Keyboard Shortcuts/Help menu in the software before starting to use it. Or you can read the How-to here: https://sourceforge.net/p/picoviewer/wiki/How-to/ You can find the Changelog here: https://sourceforge.net/p/picoviewer/wiki/Changelog/ Here's a review by findmysoft: http://pviewer.findmysoft.com/
    Downloads: 11 This Week
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  • 12
    CDG Editor is a tool that allows the user to edit the contents of a CDG file (typically extracted from a karaoke disc as mp3+g). v1.3 now supports all CD+G command types. Please note that this is not a Karaoke creation or editing tools (see some of the comments below) - it is for fixing the CDG files that you have where the text is corrupt due to a poor rip from the original CD+G disk. You have to edit individual CD+G tile commands. This tool could be used to change the lyrics of a song for example, but it would be very difficult - that's not its purpose. Thanks for the feedback though. I've installed it on several Windows 7 64bit PCs but haven't tested the installer or the app on Windows 8 yet. Let me know via the support pages if you have problems and I'll see what I can do to help.
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    Downloads: 13 This Week
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  • 13
    AK PDF Editor

    AK PDF Editor

    Best tool to merge, rearrange, rotate, delete, compress PDF files

    A very lightweight software for PDF file editing. You can merge, rearrange, rotate, delete, compress PDF files in a very simple way.
    Downloads: 3 This Week
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  • 14
    Scrolling Game Development Kit 2
    All-in-one program for creating 2D scrolling games. Compile your games into stand-alone .NET executables or customizable C# source code. The IDE and framework are build on OpenTK, which wraps OpenGL, so generated games can be cross-platform.
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    Downloads: 2 This Week
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  • 15
    Greenshot - Screen Recorder

    Greenshot - Screen Recorder

    A free and open source screenshot tool optimized for productivity

    Greenshot is a lightweight screenshot software tool for Windows that quickly creates screenshots of a selected region, window, or full screen; you can even capture complete (scrolling) web pages from Internet Explorer. Greenshot easily annotates, highlights, or obfuscates parts of the screenshot. Greenshot also exports screenshots in various ways: save to file, send to printer, copy to clipboard, attach to e-mail, send Microsoft Office programs, or upload to photo sites like Flickr or Picasa. And Greenshot has a lot more options, to simplify the creation of, and work with, screenshots every day. Overall, Greenshot is easy to understand and configurable, that's why it is an efficient tool for project managers, software developers, technical writers, testers, and anyone else creating screenshots.
    Downloads: 1 This Week
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  • 16

    Draft Notes

    Grab screen areas and note it with a mouse, pen & keyboad quickly.

    Especially for learners watching some lectures online or using video capturing devices. Grab screen areas with a click (or tap), automatically save it and allows adding notes on it using mouse, pen and keyboard - very quick (and draft). Then it is possible to view grabbed screenshots and annotate it additionally with the same set of tools, easy and convenient. May be help to somebody these sad days.
    Downloads: 6 This Week
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  • 17
    Font Pattern Editor

    Font Pattern Editor

    FNT Font editor

    This tool gives the possibility to create FNT files, that can be used in VGA compatible text-mode.
    Downloads: 6 This Week
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  • 18
    VariIcons Icon Editor
    VariIconsRevolve is an Icon and Small graphics editor suite which allows you to create and modify icons with frames up to 256x256 size using 22 pixel and vector tools, effects and a variable gradient filling. now localized for english and german!
    Downloads: 2 This Week
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  • 19
    ImageStone

    ImageStone

    A powerful C++ class library for image manipulation

    ImageStone is a powerful C++ class library for image manipulation. Its features include load, save, display, transformation, and nearly 100 special image effects. It can be used cross platform (includes Windows, Linux, Mac), and especially under windows it can be used as a DIB wrapper class.
    Downloads: 2 This Week
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  • 20
    RealmForge (now Visual3D Game Engine)

    RealmForge (now Visual3D Game Engine)

    1st 3D game engine built in C# for .NET, Visual3D Engine's predecessor

    The first 3D game engine built in C# for .NET, predecessor to the Visual3D Game Engine (https://www.poweraccess.net/visual3d-game-engine), an All-in-One Game Development Tool for Next-Gen 3D Games, MMOs, Simulations and Virtual Worlds powered by Microsoft XNA.
    Downloads: 3 This Week
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  • 21
    3UEditorObj

    3UEditorObj

    Editor for Obj files

    Editor for Obj files for 3D Printing
    Downloads: 4 This Week
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  • 22
    capdraw

    capdraw

    Capture and Draw (CapDraw) an easy to use screenshot utility.

    Capture and Draw (CapDraw) easy to use screen shot utility for windows with tools to crop a selected region, add text, or primitive shapes rectangles, ellipses, and lines. Text and primitive shapes show up in the object layer browser and can be edited, moved, resized, and reordered. Save the edited image as png, bmp, jpeg or copy and paste directly into an office document.
    Downloads: 4 This Week
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  • 23
    PictureFilter

    PictureFilter

    A tool for managing digital photos.

    Are you taking a lot of digital photos and never have enough time to look at each one of them carefully, or are you managing these pictures poorly so that you create many copies of identical photos? PictureFilter is a simple tool that helps you to find similar pictures by name, file size, and date time at which the picture is taken. And then you can remove the duplicated pictures in one click. You can also look into the EXIF info easily with this tool. and you can also easily copy, resize and save picture(s) to create a album. Right click on the main image view to bring the context menu. Enjoy and give me your comments!
    Downloads: 1 This Week
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  • 24
    Graphic Designer both from WinForm to WPF .
    Downloads: 4 This Week
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  • 25
    OpenTheme is an XML based GUI toolkit with a set of foundation class and WYSIWYG editor. Although it's originally designed for full screen GUI, it is also good for Windowed user interface, with full localization support and arbitary look-and-feel.
    Downloads: 3 This Week
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