Internet Encyclopedia of Philosophy: Rudolf Carnap: His life and work, by Mauro Murzi.
Rudolf Carnap: Features a collection of links relating to the philosopher as well as original material intended to promote the reading and understanding of Carnap's works.
Rudolf Carnap - From Jena to L.A.: An international conference hosted by the University of Jena, Germany. Program and information.
The Rudolf Carnap Page: Image gallery and links, maintained by the University of Maryland Philosophy Department.
Wikipedia: Rudolf Carnap: Article discussing the philosophers life and ideas the the free encyclopedia.