Biological buffers
Picture of Norman E Good, developer of biological buffers - in the creative technology tradition
Good buffers at wikipedia - Good reflects
Sigma's buffer page - New! Reagent acids and bases - properties
Laemmli buffers - weigh and pour recipes (simple, reproducible)
Ammonium acetate as a buffer - New! Solubility product table
Research Organics buffer table - Citrate buffers
Jovin buffer table, Sorenson's buffer table - phosphate buffers
Electrophoresis buffers, Tables - Misc. buffers
Spreadsheet titration - New! Properties of borax (primary pH standard)
The glass electrode - a caution
History of acids and bases - The pH scale
A history of acidity, GCSE notes on acids and bases
Making buffers, Buffer "tricks"
If you work with biological buffers, they're well worth understanding. Spreadsheets offer convenient calculation and visualization. I recommend Chapter 8 of Robert T Scopes' Protein Purification, 2nd ed Springer Verlag, 1987 for a brief, but extensive introduction.
For a thorough and classical treatment of acids, bases and buffers see Biophysical Chemistry, Edsall and Wyman, Academic Pr, 1958
For buffer pKas and recipes see Buffers for pH and Metal Ion Control, D.D.Perrin and Boyd Dempsey, Chapman and Hall, 1974 (out of print) - find a library which has it.