There aren’t very many, but a few do come to mind:
Favorable Winds by RurouniHime is probably the first post-Cap 2 fic I read that I really, really enjoyed. I love fics told from another person’s POV because we can see how an outsider feels about their relationship, and this was done beautifully. Also, she’s one of my favorite authors in the Steve/Tony fandom, so you should check other fics as well!
From the Past by sara_holmes is another fic that deals with Steve visiting Tony while looking for Bucky. Half of it is rough sex, but the other half is really sweet.
Iron Man: Director of S.W.O.R.D. by Pookaseraph is a long fic (about 75k) that quickly became one of my favorites. I loved it because the way she depicted the relationship between the two of them was very believable given the whole “oh crap, there’s no more SHIELD, what do we do about global security now?” situation.
Blueberry Waffles and Fireworks is much less serious than the others, and definitely more of a crack-y read, but still very enjoyable.
I also wrote I’m Ready to Lose (Everything but You) which deals with Tony coming to see Steve in the hospital right after the events of the movie.
I haven’t read the others yet, but I know for a fact that Iron Man: Director of SWORD is AMAZING. So if you like long, plotty awesomeness with slow burn, you should go read it.
knitting in the dark 