This posting is a revision of an earlier one, some of the links have needed updating others have had to be replaced and I've added a few more bits that may be of use, as before I hope it will be of help.
Many of these downloads are pretty big so if you don't have broad band I'd recommend you start with a download manager like Download Express click here or Leechget click here , they will ensure you don't lose anything if you lose your link at any point. Have a look and consider how much it would cost to buy the equivalent name brand products.
Registry cleaner :- Easycleaner click here ( Use with care, I included this as JV16 is no longer freeware and RegscrubXP has vanished. It advises you to back up the registry first, this is a good idea as it cleans rather more aggressively than the other two. )