The primary web resource for information concerning Drosophila is FlyBase. FlyBase is a community database for Drosophila genetics and genomics, supported by funding from the National Human Genome Research Institute of the National Institutes of Health. FlyBase is freely available. FlyBase includes a "Resources" page, which lists the very many other many web resources for Drosophila.
A web resource for the taxonomy and distribution of Drosophilidae is Taxodros maintained by Dr. G. Bächli. The Japan Drosophila Database makes many of the classical taxonomic papers on Drosophilidae available as PDF files.
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