EMBL Reptile Database

An incredible synopsis of the current taxonomic status of all reptiles. A source of taxonomic data, thus providing primarily (scientific) names, synonyms, distributions and related data. However, a limited number of species accounts contain links to external sources including pictures. 

IUCN Red List of Threatened Species

The IUCN Red List of Threatened Species provides taxonomic, conservation status and distribution information on taxa that have been evaluated using the IUCN Red List Categories and Criteria. This system is designed to determine the relative risk of extinction, and the main purpose of the IUCN Red List is to catalogue and highlight those taxa that are facing a higher risk of global extinction (i.e. those listed as Critically Endangered, Endangered and Vulnerable). The IUCN Red List also includes information on taxa that are categorized as Extinct or Extinct in the Wild; on taxa that cannot be evaluated because of insufficient information (i.e. are Data Deficient); and on taxa that are either close to meeting the threatened thresholds or that would be threatened were it not for an ongoing taxon-specific conservation program (i.e. Near Threatened).

Pro Exotics

Robyn and Chad are a couple of great guys - they've put together a large website with tons of useful information, much of it in Robyn's fantastic tongue-in-cheek style! Well worth a visit.

Tempgun.com

Not using a temperature gun to check on your herps? Then you are missing out on one of the handiest and most useful pieces of equipment around. Check out this site to learn more or even buy one.