How 2 recover from corrupt floppy disks?

I had a problem with my floppy driver- drivers recently, fixed problem but now have discovered two important floppys have become corrupt due to this problem. Must have added data to it after problem began without realizing. I really need to recover this data either from one or the other as one is the 2nd copy. Any ideas or shareware programs that can enable me to recover the data? Puter Specs: pentium 3-750mhz,320mb ram, running win98se. Can not afford to pay for recovery.