A recent kalamar adventure, Stand and Deliver.
I believe the last Monkeygod Enterprises highlevel mod was 3.5 (not sure, but people say it's very good) --Hellstone Deep or something.
Any mods from NG since the 3.5 (there havne't been many admittedly, but Lamintation of Thieves should be 3.5.
Nearly all (except the first, IIRC) of Goodman Games' Dungeon Crawl Classic series is 3.5.
However, really, I think adventures are a product that transend editions the best. really, the maps, storyline, placement of characters, etc. is what you pay for. It's nice to have NPC/Monster statblocks that are complient with the latest edition, but not essential for me. I'm currently running a Expert module and converting as I go.