"Send Over the Hi-Lo, Fred! We've got more thesauri for the warehouse!"

Taxonomy Warehouse - A Comprehensive Web-Directory of Taxonomies is a database of thesauri, ontologies, classification schemes, authority files and taxonomies. The database classifies the taxonomies by subject (a taxonomy of taxonomies?) and lists basic information about them. Some taxonomies can be purchased through Taxonomy Warehouse; links are also provided directly to the publisher's web site.