"Kate is a multi-document interface (MDI) text editor, available
for both KDE 3 and 4. It runs on multiple Linux and Unix-like
platforms, Mac OS X, and Windows. It also includes a component
called KatePart, which runs inside numerous other KDE applications,
including Quanta+ (on KDE 3 only), KWrite, Konqueror, and Kdevelop.
Kate provides syntax highlighting for over 120 text formats, making
it perfect for whatever programming language you choose.
"Kate will highlight HTML markup and underline errors,
particularly when you forget to close a tag. It will also group
text within tags, so that you can see what content is where. It
will display folding markers, small arrows on the side, that you
can use to collapse or expand a tag and its contents. To toggle
folding markers, press F9. For that reason, if you are coding in
XHTML, make sure to use the XML highlighting rather than HTML. It
will then appropriately mark single tags that are not closed with