I shared a cool Free GM Resource that was the Gongfarmers Almanac. I'm kind of double-dipping here, but this week's resource is not just one almanac hosted on some Google Drive, but a whole year of almanac available over at DTRPG.
The 2016 Gongfarmer's Almanac is a compilation of eight issues all rolled up into one file filled with 468 pages of goodness. Designed as a 1/2 US Letter page, I'm thinking of printing the whole thing out as a giant booklet.
The bookmarking is a bit half-assed because it jumps from Volume 1 to Volume 7, but it is free and has a bunch of cool articles.