2 links
Equal Temperament Pitch/Frequency Chart
cis.hut.fi
A keyboard based pitch to frequency chart provided by McNeil Johnston Orchestrations.
The Australasian Piano Tuners and Technicians Association (APTTA)
aptta.org.au
Consists of branch associations in WA, SA, Vic, NSW, QLD and New Zealand with a combined membership of over 300 piano technicians. Conventions are held every two years.