The title says it all.
You can also find deleted stories on Fimfetch.net and on FimfArchive.
Anonfilly stories can be published on ponepaste; you can read them there too.

Never been published:
"Dreams", by Lone15;
"The Well", by Starscribe.
Deleted:
"Anonfilly's Usual Shenanigans", by UndeadAsylum — NSFW;
"[Request] The Pigging Out Adventures of Anonfilly and Twilight", by UndeadAsylum — NSFW.