Most new wall switches seem to make a loud 'snap' sound when they're
pressed. Are there any ranges of electrical accessories which are quieter
or even silent?

It seems to me that older switches aren't as loud - this might be because
they're worn but some seem to have a softer touch, more sprung and
less snappy.

Of course you can try and operate a 'snappy' switch in a quiet manner by
pressing on it, but that's probably not much good for the switch.

Any ranges that are worth looking at?

Thanks
Theo