Taming of the Horse-Akane decides to go after Ranma (note:She's the only one with a chance, IMHO) VERY WELL DONE! This fic series portrays Akane, and especially Ranma, very nicely. I think it's the best IC (in-character) fic I've read.
Krista's "Hearts of Ice" Epic-A very nice story about the strong bonds of love that tie Ranma and Akane together. Almost done!
Gary's Comics and Manga Page-Gary's got a lot of interesting fics, mostly Ranma, with some crossovers as well. A good selection of stuff, but I definitely suggest checking out "Hearts and Minds". Hurry up and finish it, Gary!
KaraOhki's Pagoda-Kara has some great stuff; some of the first fics I read! "A Change of Scene" is really good, and so is "Breaking Free", "Travels, Training, and Trials", and "Cinders". Really recommended for those that like good WAFF (as I do). Chris's Anime Fanfiction-"The Clan" and "Ranma's Apartment" can be found here. A lot of good shorts and one-shots as well. Check out his new fic "newRanma" as well.Relentless-Action and adventure, the stuff I like. 'nuff said.
Mark Mckinnon's "Shadow Chronicles"-A great Ranma continuation. It's a little darker than most Ranma fics, but excellent characterization. Action and adventure as well, but not much humor. Be warned!
Lord Archive's Fanfiction-Home of "The Insanity Continues" "Second Chances" "Rejected" and other great fics.
Lin Lee's fanfic page-"Akane Chronicles" and a few others, but I'm really hoping she finishes up Akane Chronicles. Hurry up Jenna! Lotsa good stuff.
The Romance of Ranma and Akane-"Do you Remember...?" by Bing. Waffy, but a really great fic. The Lemon version can be found here:http://www.geocities.com/missgorman/dyrlemon.html The Lemon scenes were written by Kalaong and are pretty good.
"A Lesson in Love" by Marisa Price-Lotsa Waff, but nicely done. I'm wondering if there's a new site for this, or if it's still being worked on, since it seems there's been nothing done on this for a year? It showed up on ff.net awhile ago, so maybe the author is getting back into it.
Meiyo Ai soshite Nikushimi-Also known as "MASN". Means Honor, Love, and Hate. Suspense, a bit of action, and strong feelings. Very nice, delves into personal explorations. No update for a long time, though.
Shadow Lurker Productions-Author of "Ranma and Akane: A Love Story". Very good, but can be confusing at times. He's also a slow writer, but what he writes is worth the wait. Again, haven't seen any updates for quite awhile, though
David A. Tatums Fanfic page-"Three Souls, One Heart" and "Return of the Sisters" are both very good. So is "The Second Charlotte Cup".
David Eddy's Fanfiction-Lot of nice stuff here. Check out "Nekophobia" and "Cut Wood, Carry Water".
Art's Stuff!-"Lessons of Mastery" and other good fics.
Tanuki to Ryuu-Also known as ChaosBurnFlame's page. His fics are based on Rurouni Kenshin instead of Ranma, though he's a pretty good author. Since the Kenshin and Ranma series are similar (though not the same!), I thought I'd list his link here.