Good short module?

[Cthulhu's Librarian]

Anything from Goodman Games is wonderful. I ran The Mysterious Tower (levels 3-5) and it was great. It's fully updated to 3.5 as well.

I'll second this. There is an overview of all the GG adventures here, with a chart listing the levels and themes for each of them. I really like #5, Aerie of the Crow God, but make sure you pick up the errata on the webpage (there was a map missing from the print version).

 

[GlassJaw]

Dungeon 29 Mightier Than the Sword by Willie Walsh for levels 1-4.

So many good older Dungeon modules I would love to run. Almost too many to list.

Granite Mountain Prison would be a great one-shot/single session modules. I want to run Ex Libris but I'm not sure if that could be finished in a single session.

 

[JoeBlank]

I like Whispering Woodwind from Creative Mountain Games. There are a few encounters you can drop if the others are taking longer than expected. Easy to scale too.

Mighty Halfling, Buzz on the Bridge is in my emergency bank as an excellent short adventure is I am called upon to DM without enough notice or just need something entertaining for the PCs while on the road.

 

[Whizbang Dustyboots]

The Dragonfiend Pact/$2 module from Goodman sounds about perfect. Depending on the tack your players take, you might even have time to make them clean up all the empty soda cans.