Anapan wrote: The most commonly used software for that is Winimage.
If it's OS X, you can use cat or dd to make a floppy image easily. Mount the floppy image, then open up a terminal and type 'mount'. This will list the mounted devices and their paths. Find the line for the floppy mount and write down the device location. It will be '/dev/something'
Now that you know the floppy device, making an image is easy. Just type 'dd if=/dev/something of=floppy.img' Replace "something" with the appropriate file name from above.
It's essentially the same process as Creating Classic Mac Boot Floppies in OS X, but with 'if' and 'of' swapped. You won't need the 'skip' or 'bs' options.