Open Source C# User Interface (UI) Software

Windows Presentation Foundation (WPF) is a UI framework for building Windows desktop applications. WPF supports a broad set of application development features, including an application model, resources, controls, graphics, layout, data binding and documents. WPF uses the Extensible Application Markup Language (XAML) to provide a declarative model for application programming. WPF applications are based on a vector graphics architecture. This enables applications to look great on high DPI monitors, as they can be infinitely scaled. WPF also includes a flexible hosting model, which makes it straightforward to host a video in a button, for example. The visual designer provided in Visual Studio makes it easy to build WPF application, with drag-in-drop and/or direct editing of XAML markup. WinForms is another UI framework for building Windows desktop applications that is supported on .NET (6.0.x/5.0.x/3.1.x). WPF and WinForms applications only run on Windows.

This repo contains the source code for Telerik UI for Universal Windows Platform (UWP), which includes 20+ UI controls for developers building UWP applications. This is an open-source version of Telerik UI for Universal Windows Platform (UWP) by Progress. The project is community-supported on Stack Overflow. Commercial support is available at telerik.com/uwp where you'll find a supported commercial trial and pricing options. Please visit telerik.com for UI tools for ASP.NET, WPF, WinForms, or JavaScript. Common and device-family-specific APIs are bundled in Progress® Telerik® UI for UWP. Easily implement various functionalities in your UWP projects and create a single app package running on every device in the Windows 10 device family. Save development time with a wide range of out-of-the-box controls for various application scenarios. Manage data with the Grid or ListView components and create beautiful visualizations with the Chart, Gauges and BulletGraph controls.

WinUI is a user interface layer that contains modern controls and styles for building Windows apps. As the native UI layer in Windows it embodies Fluent Design, giving each Windows app the polished feel that customers expect. WinUI 2 is a library of controls that provides official native Microsoft UI controls and features for Windows UWP apps. WinUI 2 can be used in any Windows 10 UWP XAML app, or in a Xamarin.Forms app running on Windows 10 using native view embedding. WinUI 3 is the next generation of the WinUI framework. It dramatically expands WinUI into a full UX framework, making WinUI available for all types of Windows apps, from Win32 to UWP, for use as the UI layer. You can build new Windows apps using WinUI 3, which ships as a part of the Windows App SDK. The latest available stable release is the Windows App SDK 0.8 (previously called Project Reunion). With this release, you can ship production Desktop apps to the Microsoft Store.

wx.NET is a C# wrapper for wxWidgets (www.wxwidgets.org), providing a portable GUI toolkit for .NET programs. Supported on Windows, Linux GTK, and Mac OS X using MS.NET or Mono. Visit wxnet.sf.net or click "Project Home Page" below to learn more.

FusionEdit is an open source collaborative IDE designed for the FIRST Robotics competition.

NantReloaded is a Visual Studio .Net 2005 Add-in and a stand-alone visual app for running and configuring NAnt scripts. Also, It allows you to save and load build configurations (set of targets and properties values)

A multi-language IDE written entirely with C#.NET. My goals include giving developers a framework that will allow them to add new languages, provide diagramming services to support language modeling and visualization (eg UML Class Diagrams, etc).

An open source project for Adobe Flex development using C# and platform SDK tools with syntax color highlighting, code hints and code completion helpers.

ZCore is a set of Creative Studio for designing, testing, building ... solutions based on .NET framework. Contains UML designs tools, code editor & build tools, debug & test tools, user interface create tools ...