Hearts of the Living, the Dead, and the Deathless by QuillAndInk
Tolkien, NeoCities, less than 10K. " 5 + 1 (or, more accurately, a "2, interlude series, 2 + 1") of transgender and genderqueer Dwarves, both dead (entering the Halls of Mahal until the +1) and alive. This is celebration of queerness, of transness, and my first... published foray into Lord of the Rings fanfiction. Four thousand words, divided by headers instead of pages. Death is obviously a main theme, both peaceful and violent. Some very minor romance, not even to the extent of kissing. Some themes of plurality throughout."
A Shot in the Dark by Silver_pup
Hobbit, AO3, 200k+ words. "When he opens his eyes again, he finds himself in his old bed in his old home in his old body. Is this death? Or a trick of magic? Either way, Bilbo recognizes a second chance when he sees one, and this time his adventure with Thorin is going to go a bit differently."
Put That Kid Down by KittySmith
Camp Camp, AO3, 100k+ words. "There’s three things you need to know about David: he loves Camp Campbell, despite the number of oddballs it attracts, he loves his campers, even if they drive him up the wall, and he’d never wanted to kill anyone. It’s a shame no one believes him. After all, there’s a darker force at play at Camp Campbell, and David could use a little back-up."
Salvage by MuffinLance
Avatar: The Last Airbender, AO3, 100k+ words. "Mid-Season-One Zuko is held for ransom by Chief Hakoda. Ozai's replies to the Water Tribe's demands are A+ Parenting. Hakoda is… deeply concerned, for this son that isn't his, and who might be safer among enemies than with his own father."
Siding with Them by 4onen
How to Train Your Dragon, AO3, 100k+ words. "Thrown off a cliff and captured by the tribe’s greatest (human) enemy; how could things get any worse? A moment of sacrifice (and a dash of magic) leads poor Hiccup on an adventure of trust and fear that will leave him forever (physically) changed. HTTYD1 AU. T-rated. Transformation."
To Change the Course of the Future by authoressjean
Hobbit, AO3, 150k+ words. "Even the smallest person can change the course of the future." - Galadriel. In an attempt to get the Arkenstone back for Thorin, Bilbo discovers the ring he's been using is the One Ring. Seized by a need to destroy gold, especially gold with the ability to ensnare creature and king alike, he sets out alone for Mordor. Anything to forget about the love that gold cost him. What he doesn't know is that Thorin is no longer under the thrall of gold, and is desperately racing to catch up with him to keep him safe. They may have just started on another adventure, but this one may not end as well as their first quest."