ASM help.

I know this is crazy but does anyone know where to get a good ASM creator? I'm working on a new level system but I need a good Hex editor and a ASM creator. This is for the team hack as well just to let everyone know. The level system I intend to make is like the sphere grid on final fantasy X, and the licence grid on Final Fantasy XII put together. If anyone that's helping me with the team hack looks at this, could they leave a messenge to give me a hint on where to get those tools, or if they wanna help out for the team hack as well. Thank you