In 2012 there was a cocktail competition in the German cocktail & dreams forum which demanded Jägermeister as ingredient. The cocktailnerds there created some good recipes: http://www.cocktaildreams.de/smf/index.php?topic=8702.0. I like the Jäger Sour and the Tasbian, which basically is a variation on the Amarosa Cocktail in Vintage Spirits and Forgotten Cocktails.