libgtksourceview-dev 1.6.0-0ubuntu1 (i386 binary) in ubuntu dapper

 GtkSourceView is a text widget that extends the standard GTK+ 2.x text widget
 GtkTextView. It improves GtkTextView by implementing syntax highlighting and
 other features typical of a source editor.
 .
 This package contains the header files required if you wish to develop
 software that uses the GtkSourceView widget.
 .
 Homepage: http://gtksourceview.sourceforge.net/