ROBOT is an OBO Tool

Basic and Advanced OBO Graphs: specification and reference implementation

a biodiversity dataset tracker

Taxonaut is a Java application to compare taxonomic hierarcihes in GBIF species data.

taxonomy graphdb

A GUI Tool For Freeing Text and Data from PDF Documents

Compiles HAO ontology from OBO file and image annotations

Java-based middleware for interpreting Semantic Programming source code ontologies

TaxRef, a basic taxon name validator