And possibilities that Joss and Mutant Enemy didn't see fit to follow through on.  

Pre-History, or, They had lives before the story began on screen

Mere Human Ruffians 1884, Docklands of London. Angelus is looking for some amusement

Nothing New Under the Sun  1969, New York, Spike and Dru see something brand new

The Wolf at Rest  Ethan, before Sunnydale

Stories that fell between the cracks, or, Missing scenes

First Impressions   S1, Giles dreads things other than prophecies

Joy Delayed  S2 Buffy deserves one decent, happy moment

Sometimes the Entire World is Twelve Years Old  Spike, Xander, basement, TV, and bonobo monkeys, doing what bonobo monkeys do.

Skinny Dipping Dawn and her friends go adventuring in the middle of the night

A Conversation in a Quiet Moment Buffy and Giles, post-Grave. A chance to talk

Change One Thing  Post S6, Giles is offered a chance

Lay Me Low  Spike's home after S6

Left Side  Some people you want to have where you can't see them. Post-S7 "Dirty Girls"

The Buffet  Other folk have noticed all the new Slayers out and about

Angel on the Fourth of July  A summer night, a familiar roof

Out of Sight  not everybody gets told the things they should be told, post AtS S4

The Centipede's Foot  "And then they asked the centipede how he knew which foot to move next."

Things that might have happened if I were in charge (My own private Wishverse) 

The Neighbor  You have to think that the neighbors of the Magic Box must wonder what's going on over there.  G

Not-So-Deaf Ears  Spike wakes up from a nap next to Xander.  Vampires sense things humans can't.  G.

Reason to Celebrate  For yet another Bloodclaim anniversary.  Xander has a milestone, and Spike wants to celebrate.  G

The Blue Story  The Basement of Doom, cheesy sci-fi cliches, the appeal of things that are blue.  A story for grown-ups.

Lament of Ganymede Giles is back in England after "Tabula Rasa". Rated NC-17

Steam Xander in the comfortable warm surroundings of a Turkish bath, contemplating his future--and distractions. Spoilers for Hell's Belles.

Touch the sequel to Steam, NC-17

Guilt  Angel's learned that sometimes you just have to bite the bullet and apologize.  Some things, though, there is no apology for.  Alternative S6, where Giles came back earlier and upsetting scenes in bathrooms didn't take place.

Dropping By From the Blood_claim LJ community's Spike/Xander pornathon. Voyeurism was requested. Willow was free that afternoon. NC-17.

Living the Dream Xander's dreaming

To Every Maze A Map There should be someone willing to go down into that basement and give a crazy vampire a helping hand

The Visitor Someone from another world shows up--somewhere post "First Date", Anita Blake and Jean Claude belong to Laurell K. Hamilton, no copyright infringement intended.

Plain to See Ethan Rayne has a small job for the folks at Angel Investigations. A simple job, really. No, really. Gunn and Wesley learn some things about each other. Rated NC-17

The Duel A sequel to Plain to See.

On the Waterfront What if Wes hadn't fallen for Justine there in the park near his apartment?

When The Sky Rains Fire Gunn wakes up in Wesley's arms. Spoilers for Apocalypse, Nowish.

Can You Show Me The Way It's completly odd and strange, and Sesame Street and all her minions do not belong to me. Blame it on "Smile Time."