Piano technicians' websites

Historical Temperaments

Lehman: Bradley Lehman offers here a keyboard temperament analyzer/calculator, along with cogent explanations of the need for temperament.
Temperament Offsets: Researched by Willis Miller for Avery Todd, an exhaustive list of offsets for historical temperaments.
All About Temperaments: Excellent introduction to historic temperaments.
The Well-Tempered Clavier: Fictional, entertaining and instructive account of all the Preludes and Fugues.
Music History timeline

Tools and Supplies

HobbyLinc CA Glue: Good source for CA glue for loose tuning pins.
www.pianosupply.com/: International Piano Supply, in Astoria, OR.
Pianotek Tools
Spurlock Specialty Tools
Mother Goose Tools
Pianoforte Supply House: located in B.C.
Balaams-Ass, piano supplies catalog based in Tennessee
Renner USA site map
Renner Tool Catalog
Pianophile: Canadian distributor of piano tools, parts and supplies.
Arledge Music Wire: for ordering piano bass string replacements.

Piano-Related Software

Pscale and other computer tools for piano technicians. Calculate touchweight, stringing scales, and more. 
www.oppor-tune-ist.com for ScaleMaster, which Joe Garrett praises
Accu-tuner: Sanderson's homepage

Of Technical Interest