Bloodstone Press gives everyone in Pathfinder the ability to sling some spells around with their new Spell Cannons supplement.
From the release:
Bloodstone Press has released a new supplement for the Pathfinder Roleplaying Game titled, Spell Cannons. This 35 page PDF details clockwork, steam powered blunderbusses that shoot magical rays, cones, bolts, clouds, and more. This file also features a preview to the new Telestic Engine Campaign Setting, a sci-fi setting of steam powered space travel where spell cannons have existed for centuries.