Where The Grass Grows Green I: We May Yet Stand (Lord of the Rings)
"AU. The Quest failed. Sam killed Gollum before the Ring was destroyed and now darkness rules the lands of Middle-earth. A small group from the resistance battles both hunger and mistrust, to keep hope alive. But will the sacrifices outweigh the gain?"
A what-if fic where one (arguably) minor event (Sam killing Gollum) changes drastically the future of Middle Earth: Sauron regains the Ring, his enemies are destroyed or captives and the only resistance comes from the Rohirrim. It's written wonderfully and features some interesting OCs, beside the canon characters. Note that is quite a dark fic, and many major characters are dead. This is the first installment of six, the second is already online, but not complete yet: Where The Grass Grows Green II: On Bended Knee. The author uploads slowly, but for a fic of this quality is worth the waiting.
Ned Stark Lives! (A Song of Ice and Fire)
Exactly what says on the tin: how events would have been different in Westeros had Ned Stark lived? The author maintains the multiple pov structure, alternating among the different subplots, and everyone is - more or less - in character. The sequel is online, currently in progress: Ned Stark Lives! Part 2
The North Remembers (A Song of Ice and Fire)
"In the ashes of war-torn Westeros, the fate of the remnants of House Stark - and that of their lovers, allies, friends, and foes - hangs in the balance."
103 chapters and counting, this is a good continuation fic for those who need their Westeros fix while waiting for The Winds of Winter. The story is mostly focused on the Starks.
A Bit of Rope (Lord of The Rings)
"What would have happened if Gandalf hadn't fallen in Moria? Would the outcome have been better, or worse? Here's a darker-than-the-original but not-as-dark-as-some AU version of how things might have turned out differently...and the same...if Sam had remembered to bring a bit of rope"
Another what-if dark fic, dealing with the survival of Gandalf the Grey in Moria, the consequent absence of a Gandalf the White and a Balrog roaming Middle Earth.
As usual, if you want to suggest a good fic, drop me a mail.