cssed is a small developer editor and validator, that tries to ease the CSS editing. It is an Open Source project, it means that you can download the program but also its source.

It features syntax highlighting, syntax validation, MDI notebook based interface, quick CSS properties and values insertion, auto-completion and dialog-based insertion of CSS complex values.

Being a CSS editor, it's not limited to this language. cssed haved some support for HTML (with embbeded Javascript), XML, Javascript, Java, PHP, JSP, C, C++, Apache configuration files, .htaccess, Python, Perl, SQL, SH and other languages so it can serve quite well as multi-purpose editor.

It can be extended through plugins and scripted with Python, so it's quite easy to extend its functionality.

Homepage: http://cssed.sourceforge.net/
Download:
Tarball (gz) (0.4.0)
RPM (0.4.0)
Windows Installer (0.4.0)


Docs:
CSSED users manual (pdf)