I thought it would be helpful to provide links to some of the major reference sources I've come across. There will be some overlap, but I've come across unpublished books accidentally on obscure single sites.
This thread more or less duplicates a similar thread in "Arachnids", but focuses on the amphibian sources.
For those of you researching [and hopefully writing about] your interests, maybe this will give you a jump-start. Technical papers may be "dry" for many of you, focusing on setae counts, limb shape, statistics, etc, but they usually also include comments on distribution, ecology, and habitat. If you skim a particular paper, you can probably find a couple paragraphs which offer information useful to your particular interests.
Zootaxa publications are not tied to a publishing schedule, and appear as often as a paper is ready. Spiders and scorpions are major research areas, and new papers are possible on a daily basis. Bookmark them and check them daily if you're interested. The University of Calgary does not have online access to Zootaxa, but James Cook University in Queensland does...I happen to know someone there :> Many other online journals without free access can be accessed at a local university library, then downloaded and printed, saved to disk, or emailed to yourself.
The intent of this thread isn't to present every website. It is to SKIP most of those sites, and go directly to those which provide solid, original information.
Amphibian Reference sources
Dr. Miguel Vences - Primarily amphibians of Madagascar
http://www.mvences.de/p/p1/p1.html
Dr. Bob Murphy - Primarily amphibians and reptiles of Vietnam
http://www.zoo.utoronto.ca/drbob/publications.html
DAPTF California/Nevada - survey methods
http://ice.ucdavis.edu/CANVDeclining...ieldGuides.htm
Dr. David Wake - salamanders, especially bolitoglossines
http://ib.berkeley.edu/labs/wake/Papers.html
American Museum of Natural History - mainly systematics. Descriptions of frogs, salamanders, lizards, snakes, bees, dinosaurs, worms, etc...
http://digitallibrary.amnh.org/dspace/
Dr. Franco Andreone - primarily amphibians of Italy and Madagascar
http://www.francoandreone.it/
Directory of Open Access Journals - Anything and everything free
http://www.doaj.org/doaj?func=searchArticles
Amphibian and Reptile Conservation
http://www.herpetofauna.org/
Caribbean Journal of Science - West Indian wildlife
http://caribjsci.org/
Herpetological Contents - up to date listings of herpetological papers and book chapters
http://herplit.com/contents/
New and updated site for the previous:
http://www.herplit.com/index.php/herplit-database
CNAH - Center for North American Herpetology - papers on North American herps or major revisions.
http://cnah.org/cnah_pdf.asp
Zootaxa - Amphibia - taxonomy of amphibians - paid journal, free abstracts, some full papers are free.
http://www.mapress.com/zootaxa/taxa/Amphibia.html
Podarcis E-zine - reptiles and amphibians. Older issues available by free subscription
http://www.podarcis.nl/
Journal of Biogeography - biogeography. A few articles are free-access
http://www.blackwellpublishing.com/j...05-0270&site=1
Dr. Rafe Brown - Phillipine herpetology
http://www.nhm.ku.edu/rbrown/PublicationsMain.htm
FIELD GUIDE TO THE AMPHIBIANS AND REPTILES OF ARUSHA NATIONAL PARK (TANZANIA)
http://www.unipv.it/webshi/images/files/tanzie2002.pdf
Herpetological Conservation and Biology - open access journal
http://www.herpconbio.org/
The amphibian fauna of Pendjari National Park and surroundings, northern Benin
http://www.biozentrum.uni-wuerzburg....al.__2006_.pdf
The Amphibians and Reptiles of Malinau Region, East Kalimantan:
http://www.cifor.cgiar.org/mla/downl.../amphibian.pdf
IUCN/SSC Amphibian Specialist Group - publishers of FrogLog
http://www.amphibians.org./