In wav format:

 Dummy:
Mysterons
Sour Times
Strangers
It Could be Sweet
Wandering Star
It's a Fire
Numb
Roads
Pedestal
Biscuit
Glory Box

 The entire album of Dummy, in real audio format, is at http://www.AudioNet.com/jukebox/ram/london/Portishead.ram

Portishead:
Cowboys
All Mine
Undenied
Half Day Closing
Over
Humming
Mourning Air
Seven Months
Only You
Elysium
Western Eyes

PNYC:
(These were all recorded live).

Real Audio:
Humming
Cowboys
All Mine
Mysterons
Only You
Half Day Closing
Over
Glory Box
Sour Times
Roads
Strangers

Miscellaneous tracks:
Theme From "To Kill a Dead Man"
A Tribute to Monk & Cantella
Numbed In Moscow (remix of "Numb")
Over Remix
Toy Boy (remix of "Glory Box")
Scorn
Sheared Box (remix of "Glory Box")
Sour Sour Times (remix of "Sour Times")
Sheared Times (remix of "Sour Times")
Airbus Reconstruction (remix of "Sour Times")
Lot More (remix of "Sour Times")

Videos
Quicktime format:
Only You
Numb
Sour Times
Glory Box

Real Player:
Half Day Closing (Live)
Only You (Live)
Cowboys (Live)