Fics in this category do not exist in their complete and ideal form in any other reliable, readily-visible place on the web.
Curse of Silence (Ranma ½)
Easy Prey (Ranma ½)
Gabriel (Original Work)
Guardian Angel (Ranma ½)
Henshin Wands (Sailor Moon)
Just Pretending (Ranma ½)
Kasumi's Other Little Secret (Ranma ½)
Meow (Ranma ½)
Nabiki and Kunou (Ranma ½)
Parallel Pixie (Magical Girl Pretty Sammy)
As far as I can tell, this takes Pixie Misa (the antagonist from Magical Girl Pretty Sammy), turns her into an effeminate and widely bullied boy, makes him the protagonist, and then lets him discover a way to become a girl. Either way, I like what has been written so far.
Note: I've never watched Magical Girl Pretty Sammy and the only reason I make this guess is because I remember seeing references to the Pixie Misa character alongside this on Space Pirate Hamster's site before it went down.
Ranma 1/2 Backstory: Happousai (Ranma ½)
Return of the Instant Nannichuan (Ranma ½)
A well-done experimental introspective piece from Ranma's perspective set three years after the end of the manga. Technically this isn't vanished, but since the only other copy I could find is at the Ranma lemon archive, I felt it deserved to be visible for more than it's lime status and relation to the full lemon which follows.
Sailor Moon: Reversal (Sailor Moon)
Salvage - The Secret Platform (Original Work)
Suntans and Secrets (Sailor Moon)
The Ballad of Ranma and Akane (Ranma ½)
THE CLAN (Ranma ½)
The DELETE Key (Sailor Moon)
The Penance of Uranus (Sailor Moon)
The Secret of Shampoo's Heart (Ranma ½)
The Tendou Dojo (Ranma ½)
The Thirteenth Day (Oh! My Goddess)
The Unbearable Lightness of Being Tofuu (Ranma ½)
Youma Generals (Sailor Moon)
Fics in this category are available elsewhere, but only in a less immersive form.
newRanma (Ranma ½)
What if Ranma Saotome's immature attitude towards his fianceés had a medical explanation...? More specifically, what if Ranma was still mentally a pre-pubescent child relationship-wise due to a blood clot putting pressure on his brain? Here's a well-written tale of what he might go through after such a problem were fixed.