References to some significant Physics demo resource pages:

Berkely University

An excellent 397 page (30mb) PDF of all of Berkely University Physics Demos
Smaller downloadable PDF demo guides
HTML (webpage) individual versions of each of these demos

Physics Instructional Resource Association (PIRA)

Huge list of Physics demos all with videos
The PIRA 200 most essential experiments

Physics Demonstrations (Digital book)

A source book for teachers by Julien Clinton Sprott

NEW ZEALAND PHYSICS TEACHERS' RESOURCE BANK (Victoria University)

Homepage:

Bulk websites:

Victoria University Wellington - List of Bulk demo sites
University of Texas - Bulk list of demo sites

Must see Demo sites:

Experiments for a special day
- 28 Excellent neat physics demos from IOP
nuffieldfoundation
- An entire website dedicated to Physics demos
IOP teaching physcis in remote places
- An excellet set of PDF's covering a set of 90 demos
Physicists at play
- A range of neat demos
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