A list of anime that are about friends and their strong bond.
A list of anime that feature only women as the main characters.
These anime all have an episode celebrating Halloween, featuring common Halloween things like jack-o-lanterns, trick-or-treating or Halloween costumes.
These titles are about cute girls doing cute things! For the most part they have an all girls main cast. Only tv/web series added but you can be sure that any related specials to shows on this list would fit as well.