Morenppkomodo is a Komodo XUL extension, which transfers some functionality from Notepad++ to Komodo, like duplicating selection (line if nothing selected), etc.. Adds new commands in main toolbar. (Make sure you see http://community.activestate.com/forum-topic/duplicate-line, as Komodo already does in fact have a "Duplicate Line" facility.)
Find whole project at http://code.google.com/p/morenppkomodo/