I always post on G+ but some readers might not be completely aware of a page I'm very intent on keeping up:
OSR Products on Lulu
This is a long list of products that I have either bought or have a PDF from, and have curated into a list of goodness. There is a code through 11/26, TURKEY30, for 30% off, and I want to highlight some products before the holidays.
David McGrogan, Yoon-Suin.
One of the two best OSR products on Lulu in 2015. Yoon-Suin is a bunch of tables and ideas for running a sandbox campaign with some unique flavor.
Scrap Princess and Patrick Stuart, Fire on the Velvet Horizon.
The other best 2015 product. A statless monster manual full of inspired weirdness, in the style of an old zine done by pasting together.
Richard LeBlanc, CC1: Creature Compendium.
A great B/X monster manual. If Fire on the Velvet Horizon is great inspirational material, this is an excellent, practical, and non-standard monster book for your needs. (Richard also has a psionics book that I'm hoping will be available in print sometime soon.)
Simon Forster, The Book of Lairs.
A neat book of the type I've wanted for a while: just a collection of wilderness monster lairs. Each lair is a compact but usable mini-dungeon that you can put in a hexcrawl.
Those four are the best new Lulu-content over the past year, and all are well worth getting. I also would be remiss if I didn't do a little self promotion. Dungeon Crawl #2 and Dungeon Crawl #3 are still available on Lulu, as are two projects I was proud to contribute to: Narcosa and Petty Gods. Narcosa particularly is a beautiful book of literally trippy weirdness, and PG is a wonderful tome.