FA0 - The Festival Experience - While I like their version of Don't Cry For Me Argentina, I guess this doesn't refer to the disco group. It's a free mini adventure setting from Adventures in Filbar.
PSE6: Hellspike - The sixth Pocket Sized Adventure from Iron Tavern Press is about a wizard's tower, and is for 3rd to 5th level Swords & Wizardry characters. 19 pages (not so pocket sized, actually) and $2 (probably later $2.50).
Wrath of the Frost Queen - A third party DCC adventure for 5th level characters, $10, 48 pages.
Gygax Magazine Issue #5 - While mostly seems Pathfinder orientated, there are some OSR tidbits in it. $4.99, 68 pages. Amazingly, 44 of those pages are available in the full preview, so check that out.
The Sandbox #1 - A small freebie from Kevin Crawford of Sine Nomine. Mostly has some advice on Kickstarter, but also couple useful random tables