Tenfootpole.org has a huge number of reviews, including many of the products listed above.
tenfootpole.org | I bought this stuff and read it so you don't have to.
Hey ... I run that site! I'm trying to concentrate on new OSR modules and prefer Whimsy, Weird, Megadungeons, and long walks on the beach.
There's a lot of OSR stuff that is really just 3E with 1E stats, and I don't think that really gives a person a good feel for the 1E, Basic, or OD&D style. My picks for really good modules, style wise:
Anomalous Subsurface Environment
Shadowbrook Manor
Tomb of the Iron God
Tower of the Stargazer
Death, Frost, Doom (VERY deadly, not a good intro)
Voyage to Plague Island
Pod Caverns of the Sinister Shroom
Slightly less 'out there' and more traditional but still very very good would be:
The Barrow Mound of Gravemoor
Wheel of Evil
The Thing in the Valley
The Ruined Hamlet/Terror in the Gloaming
Jungle Ruins of Madaro-Shanti
The Slag Heap
Bone Mountain
Stonesky Delve
I have not reviewed these yet, however I suspect they will be very good:
Usherwood Adventurers (some free!)
G4-9 Super Giants!
Stonehell Dungeon
Spire of Iron & Crystal