Animal models

Rodents (Mice and Rats)

Taconic Animal Models
JAX Mice at Jackson Laboratory
Mouse Atlas and Gene Expression
Mouse Knockout & Mutation Database
Gene Knockouts by Fronties in Bioscience
Trans-NIH Mouse Initiative
Mouse Mutants with Immunological Phenotypes

Rat Genome Database (RGD)
RATMAP rat genome database

NIH Rat Genomics & Genetics
The Mouse Brain Library

Flybase
Berkeley Drosophila Genome Project
Trans-NIH Fly Initiative
Drosophila Virtual Library
FlyBrain

Amphibians

Trans-NIH Xenopus Initiative
Scientific Amphibian
The Whole Frog Project
Xenopus Molecular Marker Resource
Axeldb: A database of Xenopus gene expression patterns

Zebrafish

The Zebrafish Information Network
Trans-NIH Zebrafish Initiative

Worm

Trans-NIH C. elegans Initiative
WormBase for Caenorhabditis elegans
Caenorhabditis elegans WWW Server
elegansNet

Others

Medakafish page
SGD for the yeast Saccharomyces cerevisiae