I mentioned this one in discussion earlier in the week, I think, but never actually linked to it! The One Where Ino and Hidan are Soulmates by Tozette is an aptly-named Naruto fic about, well... Ino and Hidan being soulmates. It's messed up and creepy, but in a really cool way. I love its take on soulmate-identifying marks.
The Les Mis fandom seemed to be all about soulmate AUs for a while. These two were always my favorites:
Love is Touching Souls by lady_ragnell.
words can be unwritten by defractum.
Both are Enjolras/Grantaire, and neither are hard subversions of the trope, but they do play with it a little in different ways.
I mentioned this one in discussion earlier in the week, I think, but never actually linked to it! The One Where Ino and Hidan are Soulmates by Tozette is an aptly-named Naruto fic about, well... Ino and Hidan being soulmates. It's messed up and creepy, but in a really cool way. I love its take on soulmate-identifying marks.