In Finland we have some promotinal items from time to time like this nacho Jr-burger. It has a nachos, salsa and sour cream. The same can be had as a chicken-version too.

http://www2.mcdonalds.fi/day/ruoka/t...001&tu_id=1223

I haven´t seen these abroad. But I rarely eat at McDonald´s even at home, so they might be common elsewhere too.