This page has links to sites that are professionally or personally interesting and miscellany.
Nobody makes a penny off of anything listed here.
Samizdat Press is an on-line archive of interesting geophysical materials with particular emphasis on lecture notes and useful teaching materials. Additional financial support is provided by a variety of benefactors immortalized on Samizdat's home page. Everything there is free for the taking. The proprietors, John Scales and Martin Smith , would be delighted to add new materials to the site. Don't be shy.