Need help finding software

I’m working on lists of software for the new CDFreaks web site.
Any assist in compiling names of the various wares is greatly appreciated.
I need assist in compiling the lists in the following categories:

  1. file sharing software
  2. test and diagnostic software (already have CDSpeed, CDDoctor)

Please post names of software, and if possible, publisher and URL.

Many thanks for any assist!! has lots of info on all the file-sharing programs. p2p sharing.
if that helps