International Society for Bayesian Analysis:Promotes the development and application of Bayesian statistical theory and methods useful in the solution of theoretical and applied problems in science, industry and government.
Bayesian Abstract Archive: An archive of abstracts of research papers on Bayesian statistics. Sponsored by ISBA and SBSS.
Bayesian Analysis Archive: Part of the ArXiv e-print repository.
Bayesian Blind Source Separation: An online paper on solving the cocktail party with Bayesian statistics. Includes general introduction to the problem and links to related works.
Bayesian Inference for the Physical Sciences: An annotated index for information on Bayesian inference for the physical sciences.
Bayesian Model Averaging: Information regarding model averaging using Bayesian techniques. Software and papers available.
Biography of Reverend Thomas Bayes (1702-1761): Part of the University of St. Andrews History of Mathematics archive.
Decision Analysis Society: Promotes the development and use of logical methods for the improvement of decision-making.
Duke University Institute of Statistics and Decision Sciences: The institute has a strong focus on Bayesian statistics.
Measurement Decision Theory: Includes rules, examples, and information about adaptive testing and sequential decisions. Main ideas are presented using a binary classification (pass/fail) test and a sample three-item test.
Non-subjective Bayesian Statistical Methodology: A website and mailing list on non-subjective priors (e.g. non-informative, conventional and reference priors).
Probability Theory As Extended Logic: A monumental online book by the late E. T. Jaynes on Bayesian inference. Also has a number of related articles by other authors.
The Bayesian Songbook: A collection of often humorous songs with bayes-related lyrics sang to popular tunes on the last nights of the Valencia meetings on Bayesian statistics. Lyrics in LaTeX and postscript formats. Wav files of some songs available.