Jedit-macros is a project mainly written in ..., it's free.
XML_indent_lines.bsh Indents the lines in the selection relative to their enclosing tag. Typically, bound to C-i - use with "Shortcut Saver" plugin to make mode specific. Beware - it doesn't know about preserve whitespace elements.
Confirm_Exit.bsh Bind to C-q to avoid the hassle of closing the editor by mistake.