Backup

Winamp Podcasts:
%appdata%\Winamp\Plugins\ml\feeds.xml

Notes:
%appdata%\Microsoft\Sticky Notes\StickyNotes.snt

Putty:
HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions
HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\SshHostKeys

WinSCP:
WinSCP.ini -> Sessions