Some interesting pointers about RDF and the Semantic Web

I'm working for some month on RDF and I can remember how difficult was to learn RDF (not really to understand how it works, but what is the real power behind). Here is some links that could be usefull to discover, learn and use RDF.

Discovering RDF :

• Introduction to the Semantic Web and RDF : an excellent tutorial to understand RDF
• What is RDF ? on xml.com

Learn RDF :

• RDF Tutorial on W3CSchools
• RDF Tutorial and Examples
• The RDF page on w3c.org

Some tools to use and work with RDF :

• Sesame : RDF database and engine, our first choice, Java based
• Redland : a full-featured RDF framework, C based, many bindings to use it from other languages, our second choice since the Java binding is still in beta

• Zemantic : RDF Catalog for Zope 3 (use Python RDFLib) [early development stage]
  
• Jena : Java based RDF framework
  
• RDFDB : triple-store written in C

At Indesko we currently use Sesame (for Java based projects) and RDFLib for Python based project. We are monitoring Redland and could switch in the future if it appears to be much better than the other (mainly in term of performances).