Fire Screensaver is a beautiful screensaver that displays a realistic fire. It shows a real fire burning, and you can hear the crunching of woods burning. It has a black background and you can see the flames getting bigger as time goes by. Unfortunately, it only offers one animation, and no music, but I think that was made intentionally to only hear the sound of fire, which is, in fact, very relaxing. However, it would be great if it included different animations, so it wouldn't get so monotonous and boring after a while.
It doesn't offer many customization options and the only thing you can do is mute the sounds from the properties menu. It supports Windows 95/98/NT/2000/XP, and Vista.
All in all, Fire Screensaver is a simple but nice free screensaver that may get the attention of some users. It is very relaxing, but certainly doesn't have much to offer, so you may get tired of it soon. Fortunately, it is free, so you can use it as long as you like and then replace it for something new.