Fudge is a free — and free to adapt — rules-light RPG that has been ported to a great many settings. At the link below, you’ll find FUDGE (Freeform Universal Donated Gaming Engine) Fantasy rules.
fantasy
Unofficial Warhammer Fantasy Halfling Armies Book
Here’s an extremely well done unofficial army book for halflings in Warhammer Fantasy.
Elf Fire I’ve Stood On A Dwarf Fantasy Rules
Elf Fire I’ve Stood On A Dwarf is a set of homegrown fantasy rules.
Battle Chain Fantasy Rules
Battle Chain is a set of free wargames rules for fantasy battles. The rules are designed for 20mm – 28mm figures.
Misty Mountains Song From The Hobbit
Shadowcat does an amazing performance of Tolkien’s Misty Mountains song from The Hobbit. More amazingly, she does all 27 verses: