Academies by Pearl-O [gen]
River-centric, this covers five 'academies' in which River learns things-- some of them are from the series, some of them are possibilities (AR) that never happened. All of them are fascinating. My favourite is probably River at the Companion-school, just because it's so...River.

Something by Memlu [Zoe, Wash, kind of gen]
Cute, cute, pre-Zoe/Wash when he still had the moustache. XD A ficbit you will enjoy.

Tetchy by Debchan [Jayne/Simon]
I know, I know. You're thinking, "WTF, mates?", but I saw this on Becky's page and had the same reaction, but hell, she has good taste, so I read it and... WOW. Actually a pairing I could get behind. O_O Isn't that weird? I don't even like Simon. But I like this.

Kaylee: Natural Talents by Doyle [Gen]
A beautiful, simple Kaylee-centric piece on how she understands Serenity. It's got some very convincing brief childhood-bits and then some awesome, very mellow in-series bits.

In Stitches by KMS [Gen, Simon-centric]
Simon always gets laundry duty. [No labour on labour day.] A really great way to tie in the chore division on Serenity with the characters' individual traits and Simon's background and medical training especially. Everyone is kind of sweet and funny and River is a solid thread pulling through it. Lovely, funny, warm.

Five Times Jayne Resisted the Unsettling Urge to Hug Someone by ana_grrl [Misc]
Oh, oh! Jayne is so Jayne and so cracktastic. God, I love Jayne.

An Arrangement of Parts by Ana-grrl [Jayne/Simon]
Spoilers for Serenity (the movie). Ahh, I love the way she writes! This piece is all about what a good team Jayne and Simon make for pulling off plans, and gradually, it becomes sort of about the sex (with sex pollen!), but really, it's still just about their teamwork. And the beautiful thing is that the writing reflects that. It's smooth and rough in all the right ways and mixes together, so that every piece of this is exactly as it should be.