PHP

• sparqllib
• semsol

Haskell

• swish

Perl

• RDF::Trine
• Attean

JavaScript

• Jessa - JAvascript Suite for Sparql Access.
• RDFJS - Github Organization that maintains modern JavaScript RDF libraries based on open, maintained standards

OCaml

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

Python

• RdfAlchemy
• ORDF
• Fuxi - Bi-directional logical reasoning system for the semantic web.

Prolog

• SWI-Prolog Semantic Web Library

Rust

• atomic-lib - Library for managing and (de)serializaing Atomic Data, a strict subset of RDF.

Data Cube extensions

• inova8
• Epimorphics
• PoolParty
• Oxford Semantic Technologies
• zazuko
• Oracle
• OntoText
• TopQuadrant
• OpenLinkSoftware
• in4mium
• Xylem Technologies
• Derivo
• AtomGraph - Free your data from silos

OWL

• manchester-syntax-owl
• OWL 2 Web Ontology Language Document Overview
• OWL 2 Web Ontology Language Primer
• manchester

Linked Data Templates

• Linked Data Templates

• XSD Datatypes

RDF

• RDF 1.1 Semantics
• RDF 1.1 Concepts and Abstract Syntax
• RDF 1.1: On Semantics of RDF Datasets
• RDF Dataset Canonocalization
• RDF 1.1 Primer

RDFS

• RDF Schema 1.1

SHACL

• SHACL Shapes Constraint Language
• SHACL Advanced Features
• SHACL JavaScript Extensions
• SHACL Test Suite and Implementation Report

SPARQL

• SPARQL 1.1 Overview
• SPARQL 1.1 Query Language
• SPARQL 1.1 Update
• SPARQL 1.1 Service Description
• SPARQL 1.1 Federated Query
• SPARQL 1.1 Query Results JSON Format
• SPARQL 1.1 Query Results CSV and TSV Formats
• SPARQL 1.1 Query Results XML Format (Second Edition)
• SPARQL 1.1 Entailment Regimes
• SPARQL 1.1 Protocol
• SPARQL 1.1 Graph Store HTTP Protocol

RDFa

• XHTML+RDFa 1.1 - Third Edition
• RDFa Lite 1.1 - Second Edition
• HTML+RDFa 1.1 - Second Edition

Tabular

• Model for Tabular Data and Metadata on the Web

Open Services for Lifecycle Collaboration (OSLC)

• open-services.net

Web Annotation Data Model

• Web Annotation Vocabulary
• Web Annotation Protocol
• Web Annotation Data Model

Linked Data Notifications

• Linked Data Notifications

Linked Data Platform

• Linked Data Platform 1.0 Primer
• Linked Data Platform Best Practices and Guidelines
• Linked Data Platform 1.0
• Linked Data Platform 1.0 Test Cases

Data Cube extensions

• QB4ST: RDF Data Cube extensions for spatio-temporal components

Data Cube extensions

• RDF/POST - www-form-urlencoded` |
• Turtle - turtle` |
• TriG - trig` |
• JSON-LD - based Serialization for Linked Data. | `application/ld+json` |
• RDF/JSON
• N-Triples - based syntax for RDF datasets. | `application/n-triples` |
• N-Quads - based syntax for RDF datasets. | `application/n-quads`, `text/x-nquads`, `text/nquads` |
• Notation3
• RDF/XML
• TriX
• aREF

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• SparqlBlocks - Build SPARQL queries with blocks
• SPARQLFilterFlow

XML

• XR2RML
• paper
• RML - RDF Mapping language for mapping JSON, CSV and XML to RDF.
• ultrawrap - ($)
• db2triples - Antidot implementations of R2RML and Direct Mapping specifications.
• any23

Groups

• G2GML - Map RDF graphs to property graphs and output pg, json-pg, neo4j, pgx, aws or dot formats
• triplify-csv - CLI and Python package to generate triples or nquads from CSV files and a configuration file.
• Mapeathor - Definition of Excel-based mappings and translation to [R2]RML mappings
• RMLEditor - Community Edition of the RML Editor to create RML mappings in a visual way.

CSV/Tabular

• Morph-CSV - Exploitation of RML+FnO and CSVW for ensuring the effectiveness of SPARQL-to-SQL systems.

RDF to Property Graphs

• sparql-gremlin - SPARQL to Gremlin Translator available as a plugin of the popular Apache TinkerPop graph computing framework.

Object to RDF Mapping

• jennabean

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• The RDF Data Cube Vocabulary
• OpenCube Toolkit

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• BBC - Ontologies - The ontologies the BBC is using to support its audience facing applications such as BBC Sport, BBC Education, BBC Music, News projects and more.

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• rdf-pipeline

Data Cube extensions

• CDT
• 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.

Data Cube extensions

• BestBuy
• DataLanguage
• Eccenca
• Perfect Memory - DAM-as-a-Brain, a Platform that collects, interprets and makes any data and content actionable.

Data Cube extensions

• W3C's Gov enrment Linked Data Working Group archived wiki - "Developing standards which help governments publish their data as effective and usable Linked Data, using Semantic Web technologies"

Data Cube extensions

• DICE: Data Science Group - Universität Paderborn.
• Knowledge Representation and Reasoning Group (KRR) - Research group is based at the Vrije Universiteit Amsterdam (VU).
• eXascale Infolab - eXascale Infolab, University of Fribourg, Switzerland.
• Data Semantics Lab - Data Semantics Lab, Wright State University
• Exascale Infolab - University of Fribourg, Switzerland
• IDLAB - Ghent University, Belgium
• Data Semantics Lab - Kansas State University, USA

Data Cube extensions

• Strabon - (OS) A spatiotemporal RDF store.
• Virtuoso - ($/OS).
• Oracle - ($).
• Mulgara - (OS).
• Node-Quadstore - (OS) A LevelDB-backed graph database for Node.js supporting quads, SPARQL queries and the RDF/JS interface.
• neptune - ($) Amazon Neptune is a fast, reliable, fully managed graph database service that makes it easy to build and run applications that work with highly connected datasets.
• Atomic-Server - (OS) Graph database + HTTP(S) server with authorization and versioning. Supports a strict subset of RDF.
• NitrosBase - (F)

Academic

• dipLODocus
• SW-Store
• Yars2
• Shard
• Hexastore
• BitMat
• LUPOSDATE

Streaming SPARQL

• Strider

Federated SPARQL

• Semagrow
• SemWIQ

Federated SPARQL

• Berlin SPARQL Benchmark (BSBM)
• dice-group/triplestore-benchmarks - An Evaluation of Triplestore Benchamrks.
• RdfStoreBenchmarking
• Hobbit - Holistic Benchmarking of Big Linked Data.
• SP2Bench
• OTM Benchmark - A benchmark of object-triple mapping (OTM) libraries.

SPARQL Applications

• lens2odata - A GUI for discovery, search, and graph of RDF sources.
• sparql2xquery - SPARQL to XQuery Translator for use with MarkLogic Semantic Toolkit.
• decentsparql
• Porthole - Mac SPARQL editor and client.
• json-rql - SPARQL with a JSON-LD super-set syntax (like GraphQL for the semantic web)

SPARQL Applications

• hypergraphql - GraphQL interface for querying and serving linked data on the Web.

SPARQL Applications

• CarbonLDP - ($)

Conferences

• International Semantic Web Conference (ISWC 2019)

Blogs

• Bob DuCharme's weblog technology for representing and linking information
• Jörn's Blog
• Ontola Linked Data Blog
• Semantic Arts Data-Centric Architecture blog
• Planet RDF

Groups

• RDF-DEV - RDF-DEV COMMUNITY GROUP.
• w3c semantic web
• JSON-LD Working Group
• KG-Construction - KG-Construction W3C Community Group

Groups

• GNOSS-Sherlock - ($) Cognitive Intelligence tool for machines to understand us.

XML

• gist - minimalist enterprise upper ontology - max coverage, fewest primitives, least ambiguity.

World Wide Web Consortium (W3C)

• WGS84 - Basic Geo (WGS84 lat/long) Vocabulary.
• 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.
• pim
• prov-o - Represent provenance information.
• dcat - DCAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web.
• prof

Community

• foaf - Friend of a Friend (FOAF) ontology.
• juso-ontology - Vocabulary for describing geographical addresses and features.
• obo-relations - Relation Ontology. Relationship types shared across multiple ontologies.
• bevon - Beverage ontology.
• schema.org - Structured data on the Internet (Google, Microsoft, Yahoo and Yandex).
• dbpedia

Educational

• 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.
• New Pizza - An updated version of the well established pizza ontology tutorial covering Protégé 5+ as well as WebProtégé and introduces SHACL shapes.
• W3C Best Practices for Publishing Linked Data

Educational

• HermiT
• RacerPro
• Manchester List of Reasoners

Educational

• Linked Data
• Explorer's Guide to the Semantic Web
• Semantic Web Programming
• Semantic Web for the Working Ontologist
• Structures for Organizing Knowledge: Exploring Taxonomies, Ontologies, and Other Schema
• Validating RDF Data
• Learning SPARQL
• A Developer's Guide to the Semantic Web, 2014,2nd Ed
• Ontology Engineering
• The Data-Centric Revolution
• Demystifying OWL for the Enterprise

Emacs

• nxml-mode - nxml-mode is a major mode for editing XML

IntelliJ

• RDF and SPARQL - RDF and SPARQL plugin for JetBrains IDEs

Visual Studio Code

• Stardog RDF Grammars

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• Turtle syntax highlighter

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• trinity - An application development platform for Microsoft .NET and Mono. It allows to easily build Linked Data and Semantic Web applications based on RDF.

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• RDFConvert - RDFConvert is a simple command-line tool for converting RDF file betweeen different syntax formats.
• How to diff RDF
• pyLODE - A Python [rdflib](https://github.com/rdflib/RDFlib/)-based implementation of the [LODE](http://ceur-ws.org/Vol-932/paper12.pdf) ontology documentation tool

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• mu-semtech - An Ecosystem of User-facing Microservices supported by Semantic Models.

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• Model for Tabular Data and Metadata on the Web
• Metadata Vocabulary for Tabular Data
• Generating RDF from Tabular Data on the Web (csv2rdf)

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• Poolparty
• skosprovider - Skosprovider provides an interface that can be included in an application to allow it to talk to different SKOS vocabularies.
• skosshuttle
• protege skos editor

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• fred - a machine reader for the Semantic Web
• NIF
• Lemon - The Lexicon Model for Ontologies
• Wordnet

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• IIIF

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• openskos
• grefine-rdf-extension - An extension to Google Refine that enables graphical mapping of Google Refine project data to an RDF skeleton and then exporting it in RDF format.
• stardog-ubuntu-scripts
• motools - Music ontology tools
• activitypub
• ont-api
• ldpatch
• platform-linked-data-nederland
• m-ld - Real-time information sharing component using RDF and conflict-free replicated data types (CRDTs)
• CSO - The Computer Science Ontology (CSO) is a large-scale ontology of research areas that was automatically generated using the Klink-2 algorithm on the Rexplore dataset, which consists of about 16 million publications, mainly in the field of Computer Science.
• metreeca - The model-driven linked data platform.
• psparql - PSPARQL (for Path SPARQL) is a query language for RDF.
• opensemanticsearch
• dione - Khoaos Research Group
• TrOWL - Tractable OWL 2 Reasoning Infrastructure
• activitystrams-core
• rdf4a - RDF4J for Android.
• rdfshape
• wsml2reasoner - a highly modular framework that combines various validation, normalization and transformation algorithms that enable the translation of ontology descriptions in WSML to the appropriate syntax of several underlying reasoning engines.
• silk - Semantic Inferencing on Large Knowledge (SILK) knowledge representation system.
• robot - ROBOT is a command line tool for working with Open Biomedical Ontologies