Faulty SD card – What Software

I have a faulty SD card taken from a Sony phone which has loads of pictures on it. The phone no longer sees it and neither does the computer when I plug it via the phone or a USB card reader. I have tried various trial software to read card but to no avail. Can anyone recommend a course of action or some software that is likely to work. The problem at the moment is that the card does not appear as a logical drive and hence the software can not interogate it. Any advice appreciated.