Sad That You Can't Hear by
dragonyphoenix (G, ~500 words). After Jenny's death, Giles talks to her.
The road never travelled; for which we yearn by
kerkevik_2014 (G, 100 words). During the Burning Man Jenny seeks the answers and gets more than she bargained for.
This Isn't A Kingdom by ilovehowyouletmefall (NC-17, ~35 000 words). It's beautifully crafted longfic set in Wishverse, where Rupert Giles and Jenny Calendar unexpectedly find themselves working with a group of students, struggling to hold back the forces of darkness.
Story is a bit dark, as you expect from the wishverse fic, but it's not hoplessly dark.
And some fanart:
Click either on the links or on the thumbnails to get to the full-size images.
Giles and Jenny in matching sweaters by
officialrapunzelfitzherbert.
Jenny and Giles in an American Revolution AU by
enigmaticagentalice