ellia

http://www.masterapprentice.org/archive/m/my_aikani.html

That's the Not The Only One series by gypsy-gray. You can find it on the UCSL site here http://dymphna.net/ucsl/archive/gypsy.html starting about half way down the page with Broken, or on the wayback machine here http://web.archive.org/web/20090204193054/http://angelfire.com/tv2/tsubame_z/gypsy_gray.htm

I think that's The Needs Of The Many by D'Nalia - http://dnalia.slashcity.net/fic/hidden/needs/needstitle.htm

The story is The Ungolden, but it's by Voracity not Calia, and it's on her website here - http://voracity.e-fic.com/xover/ungolden.html

The one where Xander gives birth to an egg in a gas station sounds like the Beginnings series by multimapper - http://www.bentandtwisted.us/fanfic/begins

That sounds like "What Sound Does A Breaking Heart Make?" by lemonychocolate http://buffy.adult-fanfiction.org/story.php?no=18392

http://buffy.adult-fanfiction.org/story.php?no=5024 The future Is What You Make It by lemonychocolate (It's gone wallotext since the code update, but maybe with the name you can find a clean copy.)