Not really OSR to my mind, but there is new issue of Frontier Explorer Magazine, celebrating Star Frontiers 35th Anniversary.
AC2 Combat Shield and Mini-Adventure - Not exactly TSR's most creative title, it's actually a decent little adventure included, The Treasure of the Hideous One, a very small swamp crawl. $1.99 and 14 pages, 8 of which is the adventure.
Player's Secret: Hogunmark - One of the ideas of Birthright was to sell sourcebooks to players, representing the country their character rules. Apparently the catch was, they were priced too low to actually make much of a profit. This one is a country in Birthright's Denmark, I think. 32 pagse, $4.99
The Haunted Tower - Last "adventure pack" for the last incarnation of the D&D Basic set, featuring 3 16 page adventures. 50 pages total, $4.99
At the Mountains of Madness - This seems to be a rather unusual module where the players are members of a Antarctic sightseeing tour whose plane crashes. It apparently uses the Labyrinth Lord/Mutant Future rules. Interesting premise, but $7 for only 23 pages kept me from getting it.
Directory of Denizens - Small-ish Monster Manual for the original Metamorphosis Alpha by Jim Ward. 16 pages with full color art and $3.99
Castle Oldskull- The Pegana Mythos - 248 pages of Gods and such inspired by the works of Lord Dunsany $3.99
Friday Freebie Enhanced Map 1-27-17 - Enhanced version of Paratime Designs weekly freebie, which seems to be a underground river and cavern with a small temple area. $1.