Allen Hatcher's Homepage - Contains textbooks in Algebraic Topology, K-Theory, and 3-Manifolds.
Algebraic Topology - In Dave Rusin's Mathematical Atlas.
Surgery Bits and Pieces - Assembled by Andrew Ranicki.
xxx Math Front: AT Algebraic Topology - Preprints in algebraic topology.
Algebraic Topology Discussion List - Information on subscribing, archives of past discussions, and links to home pages of algebraic topologists.
Hopf Topology Archive - A preprint archive in algebraic topology.
Algebraic Topology and Concurrency - Applications of algebraic topology to computer science.
The Hopf Fibration - Notes and pictures of the Hopf map from S3 to S2.
Algebraic Topology by Solomon Lefschetz - Published by the AMS, available for free download as PDF files.
Algebraic K-Theory, Linear Algebraic Groups and Related Structures - TMR network coordinated in Bielefeld.
An Introduction to Algebraic K-theory - A graduate textbook, some chapters online, by Charles Weibel.
Modern Homotopy Theory - Research Training Network supported by the European Commission.
Bordism Project - To show the connections between homotopy, bordism and homology and to develop the line of thought that "homology is singular bordism of oriented simplicial complexes," into something solid and useful from a learning perspective in singular homology.
K-theory - From the atlas of known mathematics.
Modern Homotopy Theory - An EU Research Training Network. Positions, workshops, conferences, research agenda.
Handbook of Algebraic Topology - Publisher's page. Contents, ordering information.
Open Problems in Algebraic Topology - Problems in algebraic topology, listed by Mark Hovey, mathematician at Wesleyan University.
Krzysztof Pawalowski - Page includes affiliation, research interests, publications, photos, links, and some mathematical information.
Ext Charts - Ext charts for modules over the odd-primary Steenrod algebra by Christian Nassau.
Table of the Homotopy Groups of Spheres - From Toda's book: Composition Methods in Homotopy Groups of Spheres.
Higher Dimensional Group Theory - An article on how the theory of abstract groups may be generalised to higher dimensions than 1 by Ronald Brown, Bangor.
What is Algebraic Topology? - Introductory essay by Joe Neisendorfer, University of Rochester.
