Software or programs used to make game music and art ?

I really enjoy listening to video game music from the 1990's.

Whether it's the Sonic CD Soundtrack, Super Nintendo, Arcade Music, N64, Amiga, Sega Saturn Music.

I want to know, what programs or software was used to make the music ?

If anyone knows the software or program names, that's used to create the in game artwork and or cover art for above mentioned consoles. Plus if it can be run on a Windows 7 64 bit Computer, it would be very much appreciated.

Thanks for your help.

LMMS is a great place to start.

http://lmms.sourceforge.net/home.php