open-ontologies: Open Ontologies is a Rust MCP server and desktop Studio for AI-native ontology engineering. It provides 48 tools to build, validate, query, diff, lint, version, reason, align, and persist RDF/OWL ontologies using an in-memory Oxigraph triple store. It features Terraform-style lifecycle management, a marketplace of 30 standard ontologies, clinical crosswalks, semantic embeddings, and a full lineage audit trail.; samyama-graph: Samyama is a graph-vector database written in Rust. It supports OpenCypher queries, Redis protocol, vector search, and graph algorithms. It can handle billions of edges on a single machine.
Build and validate domain ontologies from natural language instructions using Claude
Biomedical knowledge graphs (PubMed, ClinicalTrials.gov, etc.)