The PocketGPSWorld.com speed camera database has cameras for over 50 countries worldwide including United Kingdom, France, The Netherlands, Australia, USA, South Africa, Hong Kong and many more. For the full list and for the numbers you can view the information on the PocketGPSWorld.com website.
If you happen to find a new camera or note that a speed limit has changed then you may qualify for a FREE Lifetime Subscription! You need to have a paid subscription from PocketGPSWorld.com for this (NB: iOS in-app subscriptions are excluded from this offer).