Hi Larrry. If the failed drive spins up, you can try using
Data Rescue II,
FileSalvage or
VirtualLab data recovery software. All are available in free downloadable demo versions that will show you exactly what would be recoverable with the full commercial version. Note that you must buy the bootable CD version of any of those utilities to use it, and you must have an external hard drive large enough to accommodate all the data you want to save.
If the drive isn't spinning, or has suffered some other sort of mechanical failure that prevents the heads from moving, only a data recovery service will have any chance of saving anything from the drive, and that will cost hundreds or thousands of dollars. This is why backing your data up regularly is essential.