dotNetRDF is a .Net Class Library for working with RDF and SPARQL programatically built with C# 3 for the .Net Framework 3.5/4.0/Silverlight 4 and WIndows Phone 7. It provides a simple object model for representing RDF, SPARQL Queries and Updates and understands all common RDF and SPARQL syntaxes.
Extensive documentation is available on the website and support is available via the mailing lists.
The Java Sitemap Parser can parse a website's Sitemap (http://www.sitemaps.org/). This is useful for web crawlers that want to discover URLs from a website that is using the Sitemap Protocol.
This project has been incorporated into crawler-commons (https://github.com/crawler-commons/crawler-commons) and is no longer being maintained.