3 links
Artemis's Fanfiction
geocities.com
Collection of fan fiction featuring the Justice League, with a focus on Batman and Wonder Woman.
DC Heroes: World's Finest Fanfiction
ironrodstudio.com
A collection of ongoing, anthology, and mini-series titles set within a shared-continuity version of the DC Universe.
JLA Unlimited
jlaunlimited.com
Archive for DC Universe fan fiction covers the comic book and animated universes. Accepts new author submissions.