Waldorf GmbH
The Makers of fine german synths like the WAVE

Many information PPG an all other wavetables synths

Hermode (HMT)
The flash animated and full of audio examples site of the HMT creator Werner Mohrlok.

Herman Seib
Here you find the famous PPG audio demos and much more PPG stuff

If you know more Waldorf, Wave, Wavetable or PPG links, please mail them to me. And please mail broken links to one of the sites above too. Thanks.