Yep, the GM's Day Sale keeps rolling along. Time for Post # 4 in the series of OSR Picks. You can catch the earlier GM's Day Sale posts here.
In no particular order:
Strange Stars by +trey causey "is a setting for any game where modern transhuman science fiction meets classic 70s space opera." Might be a good fit for your next White Star or Stars Without Number campaign.
The Dungeon Alphabet by +Michael Curtis (and art by Erol Otus). Random tables, amazing art, you really can't got wrong.
Of course, you can't have just one alphabet. The Monster Alphabet by +Jobe Bittman is also on sale (with a huge assortment of artists). More
tables, more better.
Starter Adventures by +Tim Shorts . An excellent way to introduce new players to old school gaming. Don't forget to pick up some copies of the Manor zine.
Did I mention that Purple Duck Games appears to have put it's entire catalogue of over 1,100 releases on sale. Find adventures for Labyrinth Lord, Dungeon Crawl Classics, Pathfinder, Stock Art and more on sale.