All you need is to Google or Yahoo a few rightly chosen keywords.
An eg here:
LINK
Many are either free download or give you a One Month free trial.
But again as I sail before, it is a lot easier if you try a good brand camera that provides a dedicated Panorama mode and also software for free. My suggestion among the older excellent point and shoots is: Canon A95 or may be S2 or S3 that you should be able to find on ebay for dirt cheap price.