About Scintilla (from http://www.scintilla.org):
Scintilla is a free source code editing component. It comes with complete source code and a license that permits use in any free project or commercial product.
As well as features found in standard text editing components, Scintilla includes features especially useful when editing and debugging source code. These include support for syntax styling, error indicators, code completion and call tips. The selection margin can contain markers like those used in debuggers to indicate breakpoints and the current line. Styling choices are more open than with many editors, allowing the use of proportional fonts, bold and italics, multiple foreground and background colours and multiple fonts.
This is early release (pre-alpha status), but it working. I use SciLabl in my internal project from Aug 2004 without any serious troubles. But many Scintilla commands aren't implemented yet.
Download: source .tar.bz2
Windows port:
Windows is not supported in this release. May be SciLabl can work on Windows, may be no.
Author: Anton Moscal (msk at intellij dot com)