Hardy's Internet Guide to Marine Gastropods:A virtual encyclopedia of sea snails. The catalog is organized taxonomically, and contains pictures, common and scientific names, and basic taxonomic information for a large number of species.
ABMAP: The Abalone Mapping Project: Documents and illustrates the current geographic distribution of abalone (Gastropoda: Vetigastropoda: Haliotidae: Haliotis) world-wide.
Class Gastropoda: A brief yet informative description on the characteristics of gastropods. Includes links to specific examples of gastropods.
Class Gastropoda: Overview of gastropod classification from the Animal Diversity Web.
Eurasia Shells: Large collection of gastropod specimen images (over 900 species) from the Philippines, rarely represented in the literature.
Freshwater Snails Of Florida: Contains an online version of The Freshwater Snails of Florida, a manual for identification, prepared by Fred G. Thompson.
Gastropoda of Montana: Overview of biology and taxonomy; species list for Montana.
Gastropods: Information on gastropods from an aquarist's viewpoint. Includes pages on specific orders of gastropods, as well as a general gastropod FAQ.
Living Fossils of the Deep: Expedition to the deep sea of the Bahamas to explore the world of slitsnails. From the Smithsonian Institutes National Museum of Natural History.
Mollusks of the Southwest: Research on the mollusks of southwestern United States by Harold (Dave) Dyer.
NMITA Gastropod taxonomic list: The list provides a current systematic framework and summary of the taxonomic diversity of Panama Paleontology Project (PPP) mollusc collections collected, curated and identified from project inception till October 2000.