Statistical Mechanics in a Nutshell
An introductory text book online.

PC3213
Online lecture notes for an undergraduate course in statistical mechanics.

Monte Carlo Simulation for Statistical Physics
A brief online text book on Monte Carlo Methods by Paul Coddington, Syracuse University.

Entropy
Online journal intended for collegiate audiences. Provides links to web-based articles as well as some "basic" lessons on entropy.

What Does Negative Temperature Mean?
A short article from USENET Physics FAQ.

ArXiv Statistical Mechanics
Recent papers and preprints in Statistical Mechanics.

King's College London
Statistical Mechanics and Quantum Probability Group. Staff and preprints.

Ilya Prigogine Center for Studies in Statistical Mechanics and Complex Systems
University of Texas at Austin. Links to faculty and staff, e-prints, and tutorials in chaos physics and other topics.

Center for Statistical Mechanics and Mathematical Physics
An interdisciplinary center at Virginia Tech. Staff and research interests.

Introduction to Macromolecular Simulation
HTML notes by Peter J. Steinbach on the application of statistical mechanics to the structure and dynamics of biomolecules.

History of Statistical Physics
A short review by D. Flamm of the history of statistical physics.

Statistical Mechanics in a Nutshell
Lecture notes by Jochen Rau from a course on "Transport Theory" taught at Dresden University.

Boltzmann Transport Equation
A paper by Uri Lachish studying transport phenomena: currents and transport coefficients; thermally induced diffusion.

Philosophy of Statistical Mechanics
Entry in Stanford Encyclopedia of Philosophy with bibliography and links.