ICZN was founded in 1895. Its task is to create, publish and, periodically, to revise the International Code of Zoological Nomenclature. The Commission also considers and rules on specific cases of nomenclatural uncertainty. These rulings are published as 'Opinions' in the Bulletin of Zoological Nomenclature.
The goal [of ITIS] is to create an easily accessible database with reliable information on species names and their hierarchical classification. The database will be reviewed periodically to ensure high quality with valid classifications, revisions, and additions of newly described species. The ITIS includes documented taxonomic information of flora and fauna from both aquatic and terrestrial habitats.
The Tree of Life Web Project is a collection of information about biodiversity compiled collaboratively by hundreds of expert and amateur contributors. Its goal is to contain a page with pictures, text, and other information for every species and for each group of organisms, living or extinct. Connections between Tree of Life web pages follow phylogenetic branching patterns between groups of organisms, so visitors can browse the hierarchy of life and learn about phylogeny and evolution as well as the characteristics of individual groups.