A Prime Case of Chaos: Article from Volume 4 of What's Happening in the Mathematical Sciences by Barry Cipra, describing conjectural links between the Riemann zeta function and chaotic quantum-mechanical systems.
A Three-dimensional Model of the zeta Function: Made on the rapid prototype machine at SDSC.
Analytic Number Theory: Lecture Notes by Noam Elkies, Harvard, 1998.
Critical Strip Explorer: Java applet developed by Raymond Manzoni for viewing zeta in the complex plane.
Directory of All Known Zeta Functions: A directory of websites maintained by Matthew Watkins on the topic of The Riemann Hypothesis and Zeta Function.
Inexplicable Secrets of Creation: Zeta function site by Matthew Watkins.
Irrationality and Transcendence: Lecture notes (PS) by David Angell, NSW.
Not Always Buried Deep: Notes on Analytic and Combinatorial Number Theory, originally written for the 2003 Ross Summer Mathematics Program, by Paul Pollack.
Riemann's Paper: "Ueber die Anzahl der Primzahlen unter einer gegebenen Grösse" and in translation.
Riemann's Zeta function: Notes by Xavier Gourdon and Pascal Sebah.
Some Zeta-related Functions: Recent studies on Zeta functions.
Ten Trillion Zeta Zeros: A Math Games article by Ed Pegg junior on Xavier Gourdon's computations.
The Mark of Zeta: A MathTrek article by Ivars Peterson.
Vinogradov's Three Primes Theorem: Lecture notes on the home page of Timothy Gowers (DVI format).
X-Ray of Riemann's Zeta Function: Graphic visualisation of zeta by Juan Arias de Reyna Martínez, University of Seville.
Zeta Values on the Web: A bibliography compiled by Wadim Zudilin on values of the zeta function with links to those papers available on-line.