nbsp

+/**
+ * @file insert Non-Breaking SPace for CKEditor
+ * Copyright (C) 2014 Alfonso Martínez de Lizarrondo
+ * Create a command and enable the Ctrl+Space shortcut to insert a non-breaking space in CKEditor
+ *
+ */
+
+CKEDITOR.plugins.add( 'nbsp',
+{
+	init : function( editor )
+	{
+		// Insert   if Ctrl+Space is pressed:
+		editor.addCommand( 'insertNbsp', {
+			exec: function( editor ) {
+				editor.insertHtml( ' ' );
+			}
+		});
+		editor.setKeystroke( CKEDITOR.CTRL + 32 /* space */, 'insertNbsp' );
+	}
+
+} );