I found the 3e launch list. Here's where we were through 2 months after the release of the 3 core rulebooks…
Character Sheets
Dungeons & Dragons Adventure Game
Player's Handbook
Dungeon Master Screen
Dungeon Master's Guide
*Gazetteer
*Pool of Radiance: Attack on Myth Drannor
*Sunless Citadel
*Into the Dragon's Lair
Monster Manual
*Forge of Fury
*Living Greyhawk Gazetteer
*Diablo II: Diablerie
*Hero Builder's Guidebook
In comparison, here's 5th edition…
Dungeons & Dragons Starter Set
Player's Handbook
Hoard of the Dragon Queen
Monster Manual
The Rise of Tiamat
Dungeon Master's Guide
Deluxe DM Screen
I've starred the ones that are directly in common.
Gazetteer was a 32 page preview of the later Living Greyhawk Gazetteer.
Sunless Citadel and Forge of Fury were 32 page adventures.
Pool of Radiance and Into the Dragon's Lair were clearly 2e products hastily and sloppily converted over to 3e.
Diablo 2 was best completely ignored. Waste of paper.
Hero Builders Guidebook ( Look, extra details about the things you can buy from the PHB! Look, a small handful of feats that you're not going to care about once the OP feats of the splat books start coming out! )
A lot of the early 3e releases were pretty underwhelming.