Infinity  
   Article about infinity. Talks about protential infinity and actual infinity.
   http://pespmc1.vub.ac.be/INFINITY.html

Mathnet : Does "Infinity" Exist?  
   Looks at the 3 different contexts and says for each whether infinity exists in each one and why. Links to other essay on the same site on infinity.
   http://www.math.toronto.edu/mathnet/answers/infinity.html

Counting to Infinity  
   Introduction to infinity including the origins of the sign for infinity and pictures.
   http://www.scidiv.bcc.ctc.edu/Math/infinity.html

Hotel Infinity  
   Includes articles on big ideas and concepts, an introduction on background ideas, activities, books to read and a page of resources as well as a vocabulary index.
   http://www.c3.lanl.gov/mega-math/workbk/infinity/infinity.html

Hector Parr's Essays: Infinity  
   Includes a look at the concept of infinity and the logical flaws in the different contexts of infinity.
   http://www.c-parr.freeserve.co.uk/hcp/infinity.htm

The Infinity  
   Online home of infinity with newsletter archive from 1996 to the present.
   http://www.wooster.edu/math/infinity/