NCBI Taxonomy Database
Curated classification of all organisms in NCBI sequence databases. 2.4M+ taxa from all domains of life.
Visit WebsiteBrowse the tree, filter it, or click any class to see just its corner of it.
Where this one tends to earn its keep.
Classify sequences by organism
Phylogenetic analysis reference
Metagenomic community profiling
Biodiversity studies data backbone
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Life Sciences.