The Gongfarmer's Almanac is a collection of fan-submitted goodies for Dungeon Crawl Classics (and Mutant Crawl Classics). It is released in PDF for free and you can now get the consolidated PDFs in print at Lulu. It's 428 pages and the paperback is priced at-cost at $9.81
The link is here:
If you search Lulu for "gongfarmer's almanac", you can also find the books for 2015, 2016, and 2017.