Baldwin Library of Historical Children's Literature
http://web.uflib.ufl.edu/spec/baldwin/baldwin.html

Literature for Children (digitized Baldwin Library holdings)
http://palmm.fcla.edu/juv/

Northeast Children's Literature Collection
http://www.lib.uconn.edu/online/research/speclib/ASC/children/kidlit.html

Osborne Collection of Early Children's Books
http://www.tpl.toronto.on.ca/uni_spe_osb_index.jsp

Children's Books Online: the Rosetta Project, Inc.
http://www.childrensbooksonline.org/
The Rosetta Project's collections currently contain about 2,000 antique children's books which were published in the 19th and early 20th century. Books will be put online as funding permits. The current goal of putting 2,000 volumes on line will create an online library of aproximately 65,000 html pages. However, the Rosetta Project online library is expected to eventually reach millions of html pages.

International Children's Digital Library
http://www.icdlbooks.org/

University of Minnesota Children's Literature Collections
(Including: Kerlan, Hess, Oz, Treasure Island, and the Paul Bunyan Collections)
http://special.lib.umn.edu/clrc/

Database of Award-Winning Children's Literature: http://www.dawcl.com/
Database of Award-Winning Children's Literature, purpose of the database is to have a complete reading list of quality children's literature or to find out if a book has won certain awards, also includes an explanation of the awards.

Bug Bytes, Bug Noise Museum
Containing a catalog of recorded insect noises, this Web site is presented by Richard Mankin of the Center for Medical, Agricultural, and Veterinary Entomology, a division of the US Department of Agriculture's Agricultural Research Service. Organized by species and subject, this unusual library contains approximately 40 audio clips of such subtle insect noises as the wing vibrations of a butterfly and the sound of a termite feeding. Some background noise is unavoidable with recordings such as these, but the Web site includes a sample file for training the ear to distinguish insect noises from extraneous sounds.
Gainesville, FL - Online
http://cmave.usda.ufl.edu/~rmankin/soundlibrary.html

Please see the comprehensive listing provided here by childrenslit.com.