DigitalRune Text Editor

This .NET control is a and fully functional text editor. It is free (open source) and includes:

• Undo and Redo
• Selection Drag-and-Drop
• Split-View
• Line Numbers
• Column Numbers
• Different Encodings

It further supports intelligent source code editing:

• Syntax-Highlighting
• Automatic Source Code Formatting
• Code Completion
• Code Templates
• Method Insight Windows
• Markers (Underlines, Zig-Zag Lines, and Highlighted Lines)
• Margin for bookmarks and breakpoints
• Outlining ("Folding")
• Tool Tips

The control is derived from the text editor in the SharpDevelop IDE. It is licensed under the terms of the GNU Lesser General Public License.