| Captcha | Represents a Captcha for applications. |
| CaptchaGenerator | A Captcha generator for applications. |
| ColorString | Defines a Color with an unique string-format representation in the specified string-syntax. |
| GIF | Represents a GIF image. |
| GraphicsQualityContainer | An Object that encapsulates GDI+ properties to represent in a friendlly way the overall quality of graphics. |
| Histogram | A class that represents a RGB histogram of an image. |
| PixelInfo | Represents pixel information relative to an image. |
| RegionSelectedEventArgs | Contains the event data for the RegionSelected event. |
| ScreenRegionSelector | Selects a region on the screen. |
| UtilColor | Contains color related utilities. |
| UtilDrawing | Contains drawing related utilities. |
| UtilImage | Contains image related utilities. |
| CSharpColorFormat | Specifies a string format to represent a color value in C#. |
| FlipType | Specifies a flip type operation to perform for an image. |
| GrayscaleLevel | Specifies a grayscale tone. |
| IconSizes | Specifies common pixel sizes for a icon image. |
| SystemCursorId | Specifies the (handle)identifiers of the system cursors. |
| ThumbnailCacheSizes | Specifies common pixel sizes for Windows Thumbnail Cache. |
| VisualBasicColorFormat | Specifies a string format to represent a color value in Visual Basic.Net. |
| VisualStudioColorFormat | Specifies a string format to represent a color value in Visual Studio's property grid. |