Essays about algebraic topology

Topology articles from Eric Weisstein's World of Mathematics, sponsored by wolfram.com.
Geometry/topology section of Mathematical Atlas, coordinated by Dave Rusin (Northern Illinois Univ)
What is topology?, by Bob Bruner (Wayne State Univ)
What is algebraic topology?, by Joe Neisendorfer (Univ of Rochester)
What is topology? , by Neil Strickland (Univ of Sheffield)
Encyclopedia article about topology, by Don Davis (Lehigh Univ)
What is Topology (intro to course), by Zbigniew Fiedorowicz (Ohio State Univ)
What is topology, by Kevin Iga (Pepperdine Univ)
History of Topology (early years), from St Andrews Univ History of Math archive.
Algebraic topology entry in Wikipedia (online encyclopedia)
New York Times essay by Steven Strogatz about singularities.
What is Topology page by Jerrold Siegel.
Oxford Mathematical Institute answer to What is Topology?
A History of Algebraic Topology by John McCleary (Vassar College).