µtorrent  --- ktorrent
3gp Video converter --- http://www.kde-apps.org/content/show.php?content=55313
Adobe Photoshop --- The Gimp
AnyDVD ---
Audacity ---
Audiograbber ---
avast! --- avast!
DVDx --- 
Filezilla --- Filezilla
Foxit PDF creator/reader --- Foxit reader
GAIM --- GAIM
Google Desktop ---
Gmail notifier ---
Hex Workshop ---
Media Monkey (tagging music from online database/store (Amazon) and embed cover art into tag) ---
MS Office XP --- OpenOffice
My Phone Explorer (Sony Erricsson Phone manager, not official one http://www.fjsoft.at/) ---
Nero Burning Rom ---
Notepad ++ (enhanced notepad with syntax highlighting etc) ---
Opera --- Opera
Peer Guardian 2 (Firewall, IP filter based) ---
Tortoise SVN ---
VLC --- VLC
Winamp --- XMSS (supports Winamp themes?)
WinRAR (something with a GUI)
X-Chat --- X-Chat
Yahoo Widget engine