Well if your open to anything then I suggest checking out Sword's Edge Publishing (Military Action adventures), 12 to Midnight (Supernatural/Horror adventures), Alea Publishing (Supernatural/Mystery adventures), the previously mentioned The Game Mechanics (Supernatural adventures), UKG Publishing (Zombie Horror!). This is not by any means an exhuastive list and some poking around RPG Now/DTRPG/Your Games now would undoubted find more publishers that the ones I mentioned.