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Awesome Semantic Web Awesome

A curated list of various semantic web and linked data resources.

To add something to the list please either submit a pull request or add a comment with a link to issues/awesomelets. Pull requests will be evaluated immediately for inclusion while posts while awesomelets will be evaluated at some indeterminate time in the future.

Looking for something but can't find it? Add it to the "Does it exist" list and we'll keep an eye out for it. If it's a good idea maybe someone will come along and create it!











Open Services for Lifecycle Collaboration (OSLC)

Web Annotation Data Model

Linked Data Notifications

Linked Data Platform

Linked Data Fragments (LDF)

Data Cube extensions


Format Description Mime-type
Turtle Terse RDF Triple Language. text/turtle, application/x-turtle
TriG Plain text format for serializing named graphs and RDF Datasets. application/trig, application/x-trig
JSON-LD JSON-based Serialization for Linked Data. application/ld+json
RDF/JSON RDF 1.1 JSON Alternate Serialization. application/rdf+json
N-Triples Line-based syntax for RDF datasets. application/n-triples
N-Quads Line-based syntax for RDF datasets. application/n-quads, text/x-nquads, text/nquads
Notation3 Notation3 (N3): A readable RDF syntax. text/n3, text/rdf+n3
RDF/XML RDF/XML Syntax Specification. application/rdf+xml, application/xml
TriX RDF Triples in XML. application/trix
HDT Binary RDF Representation for Publication and Exchange. application/x-binary-rdf
aREF Another RDF Encoding Form.


  • CDT
  • QUDT
  • RDF Datatyping - This document summarizes the common understanding of the RDF Core Working Group (further referred to as WG) with regards to the theoretical foundation for datatyping of literal values and serves as a basis of definition, discussion, and comparison of all proposed schemes for achieving a complete datatyping solution which are to be considered by the WG.


Companies or businesses selling products with a primary focus is semantic web technology


Companies or businesses using semantic web technologies

Research Institutions

Academic Journals


$ - Proprietary
OS - OpenSource
F - Free



Streaming SPARQL

Federated SPARQL


ARCHIVE - inactive projects or old academic projects that may lack soruce code


SPARQL Applications

Linked Data Fragments

Linked Data Platform (LDP)





Knowledge Graph Management

$ - Proprietary
OS - OpenSource

  • Metaphacts - ($) End-to-end platform to create and utilize enterprise knowledge graphs.
  • OntoWiki - (OS) Semantic data wiki as well as Linked Data publishing engine.
  • GNOSS-Sherlock - ($) Cognitive Intelligence tool for machines to understand us.
  • Wikibase - (OS) Collection of applications and libraries for creating, managing and sharing structured data.

Web Annotations





Object to RDF Mapping


  • d2rq - Database to RDF mapping engine and SPARQL server.
  • Sparqlify - Sparql -> SQL Rewriter enabling virtual RDB -> RDF mappings.
  • Sparqlify-Extendsions - Extension projects for Sparqlify.
  • quetzal - SPARQL to SQL translation engine for multiple backends, such as DB2, PostgreSQL and Apache Spark.


  • ontmalizer - Comprehensive transformations of XML Schemas (XSD) and XML data to RDF/OWL automatically.


  • R2RML-Parser - An R2RML implementation that can export relational database contents as RDF graphs.
  • Morph-RDB - An R2RML processor.
  • MusicBrainz-R2RML - R2RML mappings for the MusicBrainz schema.
  • ontop - Ontop is a platform to query relational databases as Virtual RDF Graphs using SPARQL. It's fast and is packed with features.
  • db2triples - Antidot implementations of R2RML and Direct Mapping specifications.
  • R2RML-api
  • R2RML-kit
  • Juma - Juma, jigsaw puzzles for representing mapping, is a method that applies the block metaphor to mapping languages.
  • pyrdb2rdf - A Python library for RDB2RDF Direct Mapping and R2RML.
  • sparqlmap
  • rdf2rml - R2RML Generation from simple examples.
  • ultrawrap - ($)


  • RML - RDF Mapping language for mapping JSON, CSV and XML to RDF.
  • CARML - CARML RML engine for mapping CSV, XML and JSON files to RDF

Other RDF Mappings


World Wide Web Consortium (W3C)

  • WGS84 - Basic Geo (WGS84 lat/long) Vocabulary.
  • skos - SKOS Simple Knowledge Organization System.
  • skos-xl - SKOS Simple Knowledge Organization System eXtension for Labels.
  • vcard - vCard Ontology - for describing People and Organizations.
  • void - Describing Linked Datasets with the VoID Vocabulary.
  • time - Time Ontology in OWL.
  • org - The Organization Ontology.
  • data-cube - The RDF Data Cube Vocabulary.
  • pim
  • dqv - Vocabulary for describing quality metadata.
  • prov-o - Represent provenance information.
  • dcat - DCAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web.
  • prof The Profiles Ontology is an RDF vocabulary to describe profiles of (one or more) standards for information resources.

European Commission


  • foaf - Friend of a Friend (FOAF) ontology.
  • uberon - Integrated cross-species ontology covering anatomical structures in animals.
  • juso-ontology - Vocabulary for describing geographical addresses and features.
  • obo-relations - Relation Ontology. Relationship types shared across multiple ontologies.
  • orderedlistonto - The Ordered List Ontology.
  • evidenceontology - EVIDENCE & CONCLUSION ONTOLOGY.
  • bevon - Beverage ontology.
  • cyber-ontology - Cyber Intelligence Ontology.
  • doap - RDF schema for describing software projects.
  • qb4olap - A Vocabulary for Business Intelligence over Linked Data.
  • Hydra - A lightweight vocabulary for hypermedia-driven Web APIs.
  • vocab-transit - RDF Schema for transit data.
  • ssso - Specification of Simple Service Status Ontology.
  • dso - Specification of Document Service Ontology.
  • - Structured data on the Internet (Google, Microsoft, Yahoo and Yandex).
  • SPAR - Semantic Publishing and Referencing Ontologies.
  • BFO - Basic Formal Ontology.
  • VIVO ISF - Researchers and the full context in which they work.
  • yago YAGO is a huge semantic knowledge base, derived from Wikipedia WordNet and GeoNames.
  • dbpedia


  • MMOntologies - Multimedia ontologies studied for the paper "The Landscape of Multimedia Ontologies in the last Decade".
  • Wine - Wine Ontology is a popular example of an OWL ontology.
  • Pizza - A step-by-step guide to modelling in OWL using the popular Protégé OWL tools.
  • W3C Best Practices for Publishing Linked Data
  • Coursera - Web of Data - A joint initiative between EIT Digital, Université de Nice Sophia-Antipolis / Université Côte d'Azur and INRIA - introduces the Linked Data standards and principles that provide the foundation of the Semantic web.
  • Linked Data Patterns

Ontology Development

  • protégé - Ontology editor and framework for building intelligent systems.
  • OntoVerbal - OntoVerbal is a Protege 4.2 plugin that generates natural language descriptions for classes for an ontology written in OWL.
  • OTTR - Reasonable Ontology Templates.





  • serd - Lightweight C library for RDF syntax.
  • librdf - Redland librdf RDF API and triple stores.
  • raptor - Redland Raptor RDF syntax library.
  • rasqal - Redland Rasqal RDF Query Library.



  • grafter - Linked Data & RDF Manufacturing Tools in Clojure.
  • kr - Clojure API for RDF and SPARQL - provides consistent access to APIs including Jena and Sesame.
  • clj-plaza - Clojure rdf framework.
  • seabass - A library for working with RDF with Jena in Clojure.







  • js3
  • rdfstore-js
  • rdf-ext
  • N3.js
  • Jessa
  • RDFJS - Github Organization that maintains modern JavaScript RDF libraries based on open, maintained standards
  • rdf.js
  • rdflib.js - Linked Data API for JavaScript.
  • sparks - Sparks is a set of JavaScript libraries designed for simplifying the access to RDF data.
  • SPARQL.js - A parser for the SPARQL query language in JavaScript.
  • sparqlalgebrajs - SPARQL to SPARQL Algebra converter.
  • RDForms - Construct form-based RDF editors in a web environment.
  • graphy.js - A collection of RDF libraries for JavaScript developers with a focus on performance and usability.



  • SPARQLKit - An implementation of the SPARQL 1.1 query language in Objective-C.


  • ocaml-rdf - Manipulate RDF graphs and execute Sparql queries.





  • RDFlib - Pythonic RDF API.
  • SPARQLWrapper - A wrapper for a remote SPARQL endpoint.
  • sparql-client - Python API to query a SPARQL endpoint.
  • RdfAlchemy
  • Fuxi - Bi-directional logical reasoning system for the semantic web.
  • PyShEx - ShEx interpreter for ShEx 2.0.
  • ORDF
  • Django-rdf - An RDF engine for Django projects.
  • Djubby - Linked Data frontend for SPARQL endpoints for Django.
  • SuRF
  • sparta - Simple API for RDF.
  • rdftools - Simple collection of python RDF tools.
  • cysparql - CySparql is a python wrapper over the excellent rasqal RDF library for parsing SPARQL queries.




  • sophia_rs - Sophia: a Rust toolkit for RDF and Linked Data.


  • banana-rdf - A library for RDF, SPARQL and Linked Data technologies in Scala.
  • jvmrdftools
  • SANSA-RDF - Library to read RDF files into Spark or Flink.






  • sparql4idea - SPARQL language plugin for IntelliJ IDEA.

Visual Studio Code


Sublime Text 3




Data Cube


  • DBpedia
  • geonames
  • permid - PermID: Connecting Data to the World.
  • wikidata - Wikidata is a free and open knowledge base that can be read and edited by both humans and machines.
  • lod-cloud - The Linked Open Data Cloud.



  • r43ples - Revision Management for the Semantic Web.
  • RDFUnit - RDF Unit testing and validation framework.
  • rdf-toolkit - RDF Serializer, to be used in a git commit-hook to force automatic correct rewrite of every OWL ontology.
  • TripleChecker - Look for common errors in an RDF Document.
  • owl2vcs - owl2vcs is a set of tools designed to facilitate version control of OWL 2 ontologies using version control systems.
  • dowl - Generate docs for RDF/OWL Schema.
  • rdf-pipeline
  • rdfpatch
  • TurtleValidator - A Turtle validator on command line and in browser.
  • shi3ld-http - Shi3ld for HTTP: Access control for HTTP operations on Linked Data.
  • babel - A library for skolemising (or canonicalising) blank node labels in RDF graphs.
  • - A multi-tool shell script for doing Semantic Web jobs on the command line.
  • QuitStore - Quads in Git - Distributed Version Control for RDF Knowledge Bases.
  • QuitDiff - Git diff into SparQL / Eccrev vocabulary.


  • trinity - An application development platform for Microsoft .NET and Mono. It allows to easily build Linked Data and Semantic Web applications based on RDF.
  • Wings - A workflow system.
  • rww-play - An implementation in Play of a number of tools to build a Read-Write-Web server using Play2.x and akka.
  • prissma-studio - PRISSMA Studio: a web application to create Prisms, context-aware presentation metadata for Linked Data visualization.
  • lodspeakr - Framework to create Linked Data-based applications.
  • comunica - Flexible meta query engine for the Web.
  • imagesnippets - ImageSnippets is a complete metadata editing interface that enables someone who knows little to nothing about RDF, OWL, ontologies, or even URIs to create descriptions for images using Linked Data which is written in RDF.
  • Linked Data Reactor (LD-R) - A full-stack platform for building adaptive component-based Linked Data applications in NodeJS and React.


  • tawny-owl - Build OWL Ontologies in a Programmatic Environment.
  • Widoco
  • sesame-vocab-builder - Sesame Vocab Builder provides a command line tool that allows to create constants for RDF primitives for a given namespace out of RDF ontology files.
  • HydraConsole
  • qonsole - A simple console for running SPARQL queries and displaying results.
  • ntcat - Command line tool for concatenating NTriples documents.
  • ripple - Semantic Web scripting language.
  • schema_salad - Semantic Annotations for Linked Avro Data.
  • RDFConvert - RDFConvert is a simple command-line tool for converting RDF file betweeen different syntax formats.
  • How to diff RDF
  • grlc - Web APIs from SPARQL queries.
  • Openlink Structured Data Sniffer - Browser extension for Google Chrome, Microsoft Edge, Mozilla Firefox, Opera, and Vivaldi that unveils structured metadata embedded within HTML documents and web pages.
  • ShacShifter - Shapes Constraint Language (SHACL) to various other format.
  • - namespace lookup for RDF developers
  • rdf2rdf - Tool for converting between different RDF serialization formats.


  • anthelion - A plugin for Apache Nutch to crawl semantic annotations within HTML pages.
  • SolRDF - An RDF plugin for Solr.
  • sesame-spring - Spring integration for OpenRDF/Sesame.
  • HydraBundle - Symfony2 bundle which shows how easily Hydra can be integrated in modern Web frameworks.
  • SARQ - Free Text Indexing for SPARQL using a remote Solr server.
  • EARQ - EARQ is a combination of ARQ and ElasticSearch.
  • sesametools - A collection of utilities for use with OpenRDF Sesame.
  • Imperium - Imperium is a plugin for the Play! framework similar to the existing JPA plugin that allows the use of Empire seamlessly in a Play! based application.
  • jekyll-rdf - A Jekyll plugin for including RDF data in your static site.
  • RightField - RightField is an open-source tool for adding ontology term selection to Excel spreadsheets.
  • mu-semtech - An Ecosystem of User-facing Microservices supported by Semantic Models.

Machine Learning

  • LinkedPipes-ETL - Linked Data ETL pipeline.
  • gm-sparql - Graph Mining Using SPARQL.
  • SANSA-Stack - Scalable Semantic Analytics Stack.
  • tdbloader4 - Prototype to show how TDB indexes can be generated using MapReduce.
  • jena-grande - Jena Grande is a collection of utilities, experiments and examples on how to use MapReduce, Pig, HBase or Giraph to process data in RDF format.
  • mrlin - MapReduce processing of Linked Data.
  • infovore - RDF-Centric Map/Reduce Framework and Freebase data conversion tool.
  • FOX - Federated Knowledge Extraction Framework.
  • singal-collect
  • Duke - Duke is a fast and flexible deduplication engine written in Java.
  • ODCS - The tool uses data processing pipelines for obtaining, processing, and storing RDF data.
  • etalis - Event Processing SPARQL (EP-SPARQL).
  • graph-pattern-learner - Evolutionary Graph Pattern Learner that learns SPARQL queries for a given set of source-target-pairs from an endpoint.
  • Sieve - Sieve - Linked Data Quality Assessment and Fusion.


SHACL Implementations


Other Awesome


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