Welcome. Topics you might be interested in:
See a graphic view of the historical temperaments. With the advent of electronic tuning aids, these are now viable alternatives to the "equal temperament" that has been the theoretical norm for most of the past century. Includes timeline of historic temperaments with composers. Judge for yourself which temperament to use for a specific composer.
For Tuners: Listening to Beat Rates
Links of interest to piano technicians
"Becoming Jason" -- nine passport photos
A Visual Proof of Pythagoras' Theorem