I just compiled this list of classic adventure discussions that Quasqueton started back a few years ago. Feeling it deserved its own thread rather being buried as a reply, here you go. 
These are all the threads I could find; others may have been named differently or lost in the Great Board Crash.
A series
A1 - Slave Pits of the Undercity
B series
B1 - In Search of the Unknown
B2 - Keep on the Borderlands
B3 - Palace of the Silver Princess
B4 - The Lost City
B5 - Horror on the Hill
B6 - The Veiled Society
B8 - Journey to the Rock
B9 - Castle Caldwell and Beyond
C series
C1 - The Hidden Shrine of Tamoachan
C2 - The Ghost Tower of Inverness
C5 - Bane of Llewellyn
CB series
CB1 - Conan Unchained
CM series
CM4 - Earthshaker
D series
D1-2 - Descent into the Depths of the Earth
D3 - Vault of the Drow
DA series
Adventures in Blackmoor
DL series
DL1 - Dragons of Despair
EX series
EX1 Dungeonland
G series
G1-3 - Against the Giants
H series
H1, H2, H3, H4 - Bloodstone Pass
I series
I1 - Dwellers of the Forbidden City
I2 - Tomb of the Lizard King
I3-5 - Desert of Desolation / Pharoah, Oasis of the White Palm, Lost Tomb of Martek
I6 - Ravenloft
I7 - Baltron's Beacon
I8 - Ravager of Time
I9 - Day of Al-Akbar
I12 - Egg of the Phoenix
L series
Secret of Bone Hill
MSOL series
MSOL1 - Blizzard Pass
N series
N1 - Against the Cult of the Reptile God
N2 - The Forest Oracle
S series
S1 - Tomb of Horrors
S2 - White Plume Mountain
S3 - Expedition to the Barrier Peaks
S4 - The Lost Caverns of Tsojcanth
T series
T1-4 The Temple of Elemental Evil
U series
U1 - The Sinister Secret of Saltmarsh
UK series
UK1 - Beyond the Crystal Cave
UK2, UK3 - The Sentinel, The Gauntlet
UK6 - All that Glitters
WG series
WG4 - The Forgotten Temple of Tharizdun
WG5 - Mordenkainen's Fantastic Adventure
WG6 - Isle of the Ape
X series
X1 - The Isle of Dread
X2 - Castle Amber
X3 - Curse of Xanathon
X4 - Master of the Desert Nomads
Cheers!
These are all the threads I could find; others may have been named differently or lost in the Great Board Crash.
A series
A1 - Slave Pits of the Undercity
B series
B1 - In Search of the Unknown
B2 - Keep on the Borderlands
B3 - Palace of the Silver Princess
B4 - The Lost City
B5 - Horror on the Hill
B6 - The Veiled Society
B8 - Journey to the Rock
B9 - Castle Caldwell and Beyond
C series
C1 - The Hidden Shrine of Tamoachan
C2 - The Ghost Tower of Inverness
C5 - Bane of Llewellyn
CB series
CB1 - Conan Unchained
CM series
CM4 - Earthshaker
D series
D1-2 - Descent into the Depths of the Earth
D3 - Vault of the Drow
DA series
Adventures in Blackmoor
DL series
DL1 - Dragons of Despair
EX series
EX1 Dungeonland
G series
G1-3 - Against the Giants
H series
H1, H2, H3, H4 - Bloodstone Pass
I series
I1 - Dwellers of the Forbidden City
I2 - Tomb of the Lizard King
I3-5 - Desert of Desolation / Pharoah, Oasis of the White Palm, Lost Tomb of Martek
I6 - Ravenloft
I7 - Baltron's Beacon
I8 - Ravager of Time
I9 - Day of Al-Akbar
I12 - Egg of the Phoenix
L series
Secret of Bone Hill
MSOL series
MSOL1 - Blizzard Pass
N series
N1 - Against the Cult of the Reptile God
N2 - The Forest Oracle
S series
S1 - Tomb of Horrors
S2 - White Plume Mountain
S3 - Expedition to the Barrier Peaks
S4 - The Lost Caverns of Tsojcanth
T series
T1-4 The Temple of Elemental Evil
U series
U1 - The Sinister Secret of Saltmarsh
UK series
UK1 - Beyond the Crystal Cave
UK2, UK3 - The Sentinel, The Gauntlet
UK6 - All that Glitters
WG series
WG4 - The Forgotten Temple of Tharizdun
WG5 - Mordenkainen's Fantastic Adventure
WG6 - Isle of the Ape
X series
X1 - The Isle of Dread
X2 - Castle Amber
X3 - Curse of Xanathon
X4 - Master of the Desert Nomads
Cheers!
