Sadly I haven't really done any sprite work for terraria. Though I do have a decent chunk of stuff for FTL. Mostly weapons and a ship* (Ship is not my IP so I only get credit for effort of translating it into FTL). The weapons are made from scratch however. I admit for large sprites such as the ship, it becomes apparent my shading is static and lackluster, but fortunately that's the reason why I picked FTL as my first game to mod since it's not too hard to make your ships blend in with the vanilla art.
(Kestrel for comparison)
Say hello to Bio Beam II - perfect for decorating your rival's ships with a fresh set of corpses: