dotnetrdf 

dotNetRDF is a RDF, SPARQL and Semantic Web API for .Net. It provides simple but powerfully extensible APIs for this and integrates with a variety of popular triple stores.

A library containing useful data structures like Trees, Tries, Sparse Arrays, Bloom Filters and indexing tailored dictionaries.

dotNetRDF.Data.Virtuoso provides support for using OpenLink Virtuoso as a backend triplestore with dotNetRDF

dotNetRDF.Query.FullText provides Full Text SPARQL support as a plugin for the dotNetRDF Leviathan SPARQL Engine using Lucene.Net

Package which allow integrating dotNetRDF with System.Data.DataTable

Provides a framework for building RDF-powered web applications and web APIs.

A library which provides a full SPIN implementation using dotNetRDF's Leviathan SPARQL engine

ALPHA Release - dotNetRDF.Core is a new slimmed down core data model for dotNetRDF that includes the basic APIs for representing Nodes, Triples, Quads, Graphs and Graph Stores.

ALPHA Release - dotNetRDF.IO.Core is a new slimmed down IO API for dotNetRDF. Provides support for reading and writing RDF in a variety of common formats

ALPHA Release - dotNetRDF.Sparql.Core is a revised SPARQL API for dotNetRDF. Provides data structures for representing SPARQL commands and results and the Medusa in-memory query engine.

ALPHA Release - dotNetRDF.IO.Json provides support for reading and writing RDF in common JSON based formats