Resin Casting

https://www.boardgamegeek.com/filepage/131855/resin-casting-cheap

Looks like a fun project.

Automatic Generation of Fantasy Role-Playing Modules

http://eldar.mathstat.uoguelph.ca/dashlock/eprints/ACG7.pdf

Features a goblin outpost as a proof of concept.

The Fantasy RPG Class Test

https://www.helloquizzy.com/tests/the-fantasy-rpg-class-test

Features a plethora of interesting classes.

Sentient Coprolite

When you use your favorite search engine (does anyone besides me remember when it was Dogpile?) to search for "sentient coprolite," are you (like me) amazed bordering on stupification at how few exact matches you get?

Radiance RPG

http://www.radiancerpg.com/

Interesting rules, and the players guide is a free download.

As an aside, what does RPG mean to you?

When I read or hear RPG, the first thing I think of is rocket propelled grenade, not role playing game.

Acheron

http://monstermanualsewnfrompants.blogspot.com/2012/02/planescape-scrawling-on-classics.html

Features some very interesting ideas on Acheron and several other topics.

Formians

http://paizo.com/pathfinderRPG/prd/bestiary4/formian.html

Humanoid ants, not to be confused with fomorians, some of the latter might have goat-like heads.

Yes, it can be confusing.

Skaven Loot Tables

http://dailyempire.guildredemund.net/wp-content/uploads/2015/05/RandomSkavenTrappings.pdf

Very creative loot tables.

Fantasy Character Classes

http://tvtropes.org/pmwiki/pmwiki.php/Main/FantasyCharacterClasses

An absolute treasure trove of ideas about fantasy character classes.

Vey well done.