https://github.com/dokufreaks/plugin-keyboard/archive/master.zip

http://foosel.org/_media/snippets/dokuwiki/plugin-keyboard.tar.gz

$ cd lib/plugins/keyboard/lang
$ cp -rp en ja

※恐らく新URLでインストールしたバージョンでは下記の必要無し

# diff -u ./inc/toolbar.php.org ./inc/toolbar.php
--- ./inc/toolbar.php.org	2014-12-04 16:53:43.000000000 +0900
+++ ./inc/toolbar.php	2014-12-04 16:54:10.000000000 +0900
@@ -223,6 +223,13 @@
                 'key'    => 'y',
                 'block'  => false
                ),
+           array(
+                 'type'   => 'format',
+                 'title'  => 'Mark text as key press',
+                 'icon'   => '../../plugins/keyboard/keyboard.png',
+                 'open'   => '<key>',
+                 'close'  => '</key>',
+                ),
         ));
     } // end event TOOLBAR_DEFINE default action
     $evt->advise_after();

5-5-A-6-7-8-9

参考サイト: http://kit.mydns.jp/dokuwiki/dokuwiki/plugin/keyboard