Links for out of print texts and downloadable books:

   Andrew Lang colour fairy books.

    Sur la Lune-     1660 fairy tales and 40 ebooks of stories.

     Ashliman's site for folk tales - he lists them under themes so that you get 15 variants of Cinderella, or folktales that have "abduction by aliens”.

  Stav Academic Library  -   has a mixture of folk tales and historical papers.

   Theoi Greek Mythology    - website for classical myths.

 Chest of Books  - another useful collection of out of print folk tale and fairy tale books that you can download.

   Applit          - Appalachian Folktales in Children's Literature and Collections for all ages.

  Project gutenberg   -  many free downloadable books!

 Sacred texts

   - more texts, including folklore (and opportunity to buy searchable CDs which contains the texts).

 Forgotten Books

     - another source of free downloadable books (which is also a print on demand company which will sell you a paper copy).

Kessinger Rare reprints

   - it's not a free download, but a print on demand  access to out of print books (works through Amazon).