In these fics, Angel and/or Spike turn human...not that they always stay that way *g*
1.
Mayfly Days by
JennyOnce again, the master of all things spangel can do no wrong. Here, Spike checks up on Angel 10 years post shanshu to see if he's happy.
2.
Where We Belong by
angelspike69 &
anamcara420William and Liam are creative, successful amnesiacs who meet serendipitously and are inexplicably drawn to each other.
3.
For the Love of the Childe by
Vix This is the oddball of the bunch in that this isn't a post-NFA flick, so the term shanshu may or may not be 'technically' appropriate, but Angel is turned human during the episode 'the trial'. The best part of this fic are the priceless scooby/fang-gang interraction and the scheeming/reactions of Darla, Buffy, and Spike.
4.
Pinch me by
itsabigrockA post-NFA Spangel shanshu fic set in a dystopic landscape.
5.
Of Kings and Common Men by
flaming_muse Illyria's pets try to get by as best they can in her bleak kingdom despite her neglect and a distinct lack of hope.
ETA: Mod asked me to rate these fics, so I'll say that all of them contain full-on boy!sex and some contain bloodplay, but I don't think I've overlooked any other specifically squicky warnings.