Manual of the Planes- Archdevils are now offering Infernal Pacts in 4th ed.

Star pact- isn't clear precisely what the entities are- if they are the stars themselves, or the creatures from the far realm, or what.

Cthugha, lord of the Fire Vampires, who dwells on a distant star, is closest thing in Cthulhu mythos to a Star Pact entity.