Here's a few that I liked not only for these author's takes on these pairings, but for the fact that they are well written.
Ship: Gale/Peeta
Summary: Peeta never expected to see Gale on the Victory Tour. He especially didn't plan on sharing a room with him. The real quesion is, can they get along, or will they end up killing each other?
Ship: Peeta/Cinna
Summary: He still loves her, but he loves Cinna more. And that isn't going to change.
*I've recc'd this previously, but I think it deserves to be in this post too.
15 Pairings (Drabbles 007 and 011.) by aimmyarrowshigh
Ships: Haymitch/Brutus and Haymitch/Chaff
Summary: None given.
Ship: Cinna/Finnick
Summary: Before he was a stylist, Cinna met a victor at a party. The rest isn't quite history.
Ship: Haymitch/Chaff
Summary: “Tell you what,” Haymitch groans, more because it’s annoying than because Chaff is taking too damn long to get Haymitch’s pants open with one hand. “Next one to mention the Games doesn’t get off.”
I'm probably missing some major everyone-reads-this-fic because I don't read any slash (I'm more of a femmeslash reader), so if you're like o_O why haven't you listed such-and-such?! leave the fic's name and/or link in a comment :)
~ Little Miss Mionie
PS. The next few recommendation posts I will be making in the coming weeks are:
Tips of Brushes, Blades of Arrows by KaKaVegeGurl - A Prim-Centric Post - Erotica/PWP/Smut Recs