Hand Written Equation Creator
WYSIWYG html editor for .NET (C#, VB.NET)
A suite of tools designed to enhance your interactive whiteboard.
Wiki .net is a simple and open source wiki engine running on Asp.Net
Equation editor for Python
cross platform latex-to-bitmap-to-clipboard gui
ASP.NET Framework for Open Source Libraries
FCKeditor Editor
ogeditor is Web-based simple CMS with powerful WYSIWYG/Script editor