Best Open Source Semantic Web Software 2026

Semantic Web Software

Semantic Web Mac BSD System Clear Filters

Browse free open source Semantic Web software and projects for Mac and BSD below. Use the toggles on the left to filter open source Semantic Web software by OS, license, language, programming language, and project status.

Try Google Cloud Risk-Free With $300 in Credit
No hidden charges. No surprise bills. Cancel anytime.

Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.

Start Free
Gemini 3 and 200+ AI Models on One Platform
Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

Build generative AI apps with Vertex AI. Switch between models without switching platforms.

Start Free
1

Sesame

Java RDF Framework

This project is no longer actively maintained. It is succeeded by the Eclipse RDF4J project, which can be found at GitHub and at http://www.rdf4j.org/. Sesame is a de-facto standard framework for processing RDF data. This includes parsing, scalable storage, reasoning and full SPARQL 1.1 query/update support. Sesame offers a fully modular toolkit and an easy-to-use Java API that can be connected to all leading RDF storage solutions.

16 Reviews

Downloads: 4 This Week

Last Update: 2016-07-23
See Project
2

HERAKLES

HERAKLES is a reasoning broker framework for OWL (Web Ontology Language) reasoning systems.

Downloads: 0 This Week

Last Update: 2014-12-20
See Project
3

MACOW. Mandatory AC on Open Worlds

MACOW is a formal and scalable mandatory access implementation suitable on open worlds such as the provided on Semantic Web, Autonomic Computing and Coaltions and Federations scenarios. It is able to access control on distributed systems.

Downloads: 0 This Week

Last Update: 2013-04-10
See Project
4

MapPSO

MapPSO is a tool for Ontology Alignment, which uses Discrete Particle Swarm Optimisation. A particle swarm is used to search for the optimal alignment. The algorithm is massively parallel and adapts naturally on parallel architectures.

1 Review

Downloads: 0 This Week

Last Update: 2013-04-30
See Project
AI-generated apps that pass security review
Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.

Try Retool free