Some that I can think of:
-The development of horse artillery.
-solid casting of gun tubes.
-improved metallurgy that allowed betting casting methods for artillery.
-the wider use of rifles, vice smoothbores, on the battlefield.
-the carronade.
-the flintlock for firing naval artillery.
-the myriad developments for better field artillery, such as screw in vents, brass housings for artillery wheel naves, the iron axle, better and improved artillery sights, etc.
-improved artillery tools such as the etoile mobile, that greatly improved the production of gun tubes.
-improved powder and ammunition for artillery.
paints brigs for the British fleet.