Perplexica is an AI-powered search engine. It is an Open source alternative to Perplexity AI

R Shiny app for comparison of annotations (e.g., cell type assignments)

Source ontology files for the Gene Ontology

Ontology for the description of human clinical features

Ontology Access Kit: A python library and command line application for working with ontologies

An ontology of cell types

An ontology of gross anatomy covering metazoa. Works in concert with https://github.com/obophenotype/cell-ontology

Mondo Disease Ontology

Simple Standard for Sharing Ontology Mappings

Linked Open Data Modeling Language

LLM-based ontological extraction tools, including SPIRES

Bootstrap an OBO Library ontology

ROBOT is an OBO Tool