Algebraic Topology Discussion List http://www.lehigh.edu/~dmd1/algtop.html^{pop}
The primary functions of this list are: providing abstracts of papers posted to the Hopf archive, providing information about topology conferences, and serving as a forum for topics related to algebraic topology. The site also serves as an archive of links to websites related to algebraic topology.

TTT on WWW http://www.shef.ac.uk/~pm1jg/ttt/ttt.html
The Transpennine Topology Triangle is a topology seminar partially supported by the London Mathematical Society with vertices at Leicester, Manchester and Sheffield.