Open Source C# User Interface (UI) Software for Windows

Switches between the dark and light theme of Windows at scheduled times. Tired of looking at dark content while the sun is shining brightly? But at night everything is suddenly too bright? Auto Dark Mode is the solution for you! Android, iOS and MacOS already offer the possibility of changing the system design based on the time of the day. We're bringing this feature to Windows on a larger scale. Auto Dark Mode helps you to be more productive. Because you shouldn't care about changing Windows settings several times a day. As soon as the sun goes down, we'll take care of your eyes. Because a simple design change would be too boring, Auto Dark Mode is packed with useful functions. For example, we can also change your desktop wallpaper or run custom scripts. Compatible with Windows 10 and Windows 11. Windows .Theme switch, to also change Accent Color, Slideshow and Mouse Cursor.

The docking library for .Net Windows Forms development which mimics Visual Studio .Net.

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.

Cloud Toolkit .Net provides many useful and good-looking .Net controls for use with .Net applications (VC++, VC#, VB.Net etc). Update (September 2011): The project has been inactive for a few years and will remain so. No support provided!

Colora is a useful small color converter and screen color picker tool for Windows. Colora makes it easy to pick colors from screen and save them. The color picker is tested to work with Windows 10 and DPI scaling. Picked colors can be configured and converted between various formats such as RGB, Hex, HSB, HSL and CMYK. The integrated palette tool then allows you to create color palettes from selected colors or the history of picked colors. Support: https://sourceforge.net/p/colora/discussion/ https://github.com/bluegrams/colora/issues

A docking framework library for Gtk Sharp developments.

Our project was born from the idea of creating gravitational fields near the visual controllers in a given application.In case of cursor “braking” near the controllers, gravitational fields are formed and become active, aiding and improving the correct placement and selection of the desired controller. All this process doesn’t put any restriction in free cursor movements: the fields are activated only in case of cursor braking near a predefined control. No unwanted interrelations or selections.A determinant library in a specific situation. xMouse only works when it’s imported into an application, after configuring the fields of every control. xMouse is the perfect solution for anyone which desires to have more control over his own personal computer, simplifying the interaction between man and machine.

Clipboard Viewer .NET allows viewing current content of the Windows clipboard. In case of an image or text content users can view the content as picture respectively as text (RTF/HTML).

Karna .NET is freeware C# library for fast developing widgets, docks, screenlets and other types of Internet Desktop Applications, that merges the best qualities and behaviors of the the web and desktop in both end-user experience and in development

The SolidForms project provides an implementation of an XForms processor and implementations of user interfaces for MIDP devices and .NET. The XForms engine is very extensible and is built to allow easy integration with different kinds of user interfaces