At Elysian Fields there's:-
And Here We Go Round Again by Megan
Following on from the end of As You Were. Spike, devastated by Buffy's rejection, finds solace in a bottle shared with Anya and finds his unlife turned completely on its head. He finds that vengeance might not be for losers after all as he is thrust into the opportunity of a lifetime. But can he convince Buffy to take the risk?
Change Partners and Dance by dreamweaver
What if when Buffy first arrived in Sunnydale, instead of a souled Angel meaning to help her, she was faced with a soulless Spike, looking to cause trouble and kill his third Slayer?
Her Way by dreamweaver
After Spike burns up in the Hellmouth, Buffy demands that the Oracles send her back in time.
His Way by dreamweaver
After 'Not Fade Away' Spike finds himself resurrected yet again and sent back in time by the PTB to fix things for Buffy.
Sideways by GoldenUsagi
AU. Spike's a vampire who'll do anything if he's paid enough. Buffy's a girl who needs protection. She slowly realizes he's more than he seems, but more is going on than meets the eye, and everything changes when she's called as the Slayer.
Anticipation by 2writers4spike
Having no idea how it happened, Spike finds himself back in 1977, reeling from a newly acquired soul and more guilt than most could handle. After dodging Drusilla, his main focus is getting back to his own time and back to Buffy in Sunnydale so that he can atone for all he's done.That is, until he sees the newly born slayer in 1981 and goes off in a new direction. Can he stop the events that brought misery to Buffy's life, or will he be forced to watch destiny destroy the woman he loves all over again?
And at Bloodshedverse:-
Lonely in Your Nightmare by bloodshedbaby
During an alternate season 2, Buffy is on the run to avoid recapture by the military group that had kidnapped and experimented on her. But when she finds herself pregnant through artificial means, her desperation to stay one step ahead of them escalates.
Axis of Love by Always_jbj
What would have happened if Spike had discovered his feelings for Buffy before Angel left her jaded and emotionally scarred? (AR from School Hard)
Enjoy!!

Sarah