—utorrent – deluge
—mediamonkey – banshee for gnome, amarok for KDE but works great too in gnome
—VLC, realplayer, divx player – well, VLC, great alternative Mplayer too
—harmony assistant – tux guitar or something like that.
—recuva – there are several linux tools for recovery although maybe not as easy as recuva, please prove me wrong
—idump – well i normally use rythmbox to listen music from my nano, im not sure it works on banshee.
—hijack this – does not apply on linux, there is really not a lot of spyware for this OS
—picasa – F-spot, there is a picasa for linux too, but this is application is better in my opinion
—revo uninstaller—the package manager rulez!!! does not apply on this OS
—wavepad – audacity
—swith sound converter – VLC can do this job
—CCcleaner – This tool does not apply on linux, crap does not get in the system like in windows.
—Ashampoo – Brasero, K3B
—Total image converter – there are several tools for this, gimp can do the job, nautilus image converter works great too.
Most software you used to keep windows in shape will not be required in linux as it is a system that does not require so much maintenance. Also as you wont be running a firewall, antivirus, defragmenter, antispyware, registry cleanter you will have more space and ram to do real stuff.
Good Luck! :)