Ad captandum vulgus - To appeal to the crowd -- often used of politicians who make false or insincere promises appealing to popular interest
Ad clerum - To the clergy
Ad eundem gradum - To the same level

Ad eundem

Of admission to the same degree at a different university

-2

Ad eundum quo nemo ante iit - To boldly go where no man has gone before
Ad fontes - To the sources (motto of Renaissance Humanism)
Ad fundum - To the bottom / To the end (said during a generic toast, like bottoms up!)
Ad hoc - For a particular purpose. (improvised, made up in an instant)
Ad hominem - Appealing to a person's physical and emotional urges, rather than her or his intellect
Ad honorem - In honour. Honour not baring any material advantage