World Scale Depository
Construction of a reference center of scale measurements throughout the world.
http://www.anaphoria.com/depos.html

Pythagorean Tuning and Medieval Polyphony
Article by Margo Schulter written in 1998.
http://www.medieval.org/emfaq/harmony/pyth.html

Tuning and Temperament Bibliography
Extensive list of print books, magazines, and journal articles on tuning systems.
http://www.xs4all.nl/~huygensf/doc/bib.html

Understanding Temperaments
Tunings used for harpsichords.
http://pages.globetrotter.net/roule/temper.htm

Tuning by Ratios
This paper explores the use of simple ratios to tune musical intervals and chords. Included are a tutorial, a set of computer programs, and a re-tuned two-part invention by J.S. Bach.
http://www.leeds.ac.uk/music/studio/rproj_swss/tuning/tuning.htm

Equal Temperament Tuning
An introduction to equal temperament for guitarists who have problems tuning their guitars.
http://users.adelphia.net/~cygnusx_1/equal_temperament.html

A Tour Up The Harmonic Series
Basic introduction to the Pythagorean circle of fifths and the physical basis for the need for alternative tuning systems.
http://www.redshift.com/~dcanright/harmser/

An Introduction to Historical Tunings
Discusses the development of tuning systems in Medieval Europe.
http://www.kylegann.com/histune.html

Dictionary of Microtonal Music Theory
Dictionary of common terms used in just tuning and equal temperament style tunings.
http://www.tonalsoft.com/enc/encyclopedia.aspx

The Development of Musical Tuning Systems
The historical development of musical tuning systems from ancient Greek origins to the development of equal temperament.
http://www.midicode.com/tunings/

Historical Tunings on the Modern Concert Grand
Tradational tunings of the grand piano and Beethoven's specific tunings.
http://www.uk-piano.org/edfoote/

Musical Tunings and Temperaments
Color-coded descriptions of tunings and temperaments from the 9th Century through the 16th Century.
http://www.j2b.co.uk/tuning/

Larpis.com
Previously unknown temperament found on the autograph title page of the "Well-Tempered Clavier"; published 2005. Includes explanations and links to scholarly articles.
http://www.larips.com

Keyboard temperament analyzer/calculator
Excel spreadsheet that analyzes keyboard temperaments: gives beat rates for tuning, and harmonic-tension charts in all keys.
http://www-personal.umich.edu/~bpl/temper.html

Pitch and Scale of the Great Highland Bagpipe
Describes proper tunings and scale construction for the Great Highland Bagpipe.
http://www-personal.umich.edu/~emacpher/pipes/acoustics/pipescale.html

Tantrum
Tool for the study of temperament anomalies.
http://www.musanim.com/mam/tantrum.html

The Argument for Equal Temperament
Fred Lerdahl's paper regarding the use of equal temperament over just tuning.
http://eamusic.dartmouth.edu/~kov/lerdahl/EqTemp.html

Alternate Temperaments: Theory and Philosophy
Introduction to tuning systems, based on the Western cents system. Written by Terry Blackburn.
http://www.terryblackburn.us/music/temperament/index.html

Comparison of Temperaments
Table comparing various Western and Non-Western temperaments.
http://members.pcug.org.au/~apurdam/tempers.html

Historical Tuning
Includes information on the differences between equal temperament and well temperament and why Bach rejected equal temperament and celebrated well temperament.
http://users.bestweb.net/~rmp/