1) General reference

Romanian Travel Company
http://dreamtoursint.com/$

Credit score calculator
http://www.bankrate.com/brm/fico/calc.asp

CIA's World Fact Book - useful, intersting, up-to-date geograpgy info.
http://www.cia.gov/cia/publications/factbook/

US States facts -- fun, but not terribly good

free maps from UT Austin
http://www.lib.utexas.edu/maps/australia.html

2) stuff from Kip Thorne

--> Kip, Mihai and Yanbei - Ph 237 movies
A nice class we put together last year. All lectures availiable for download.

--> Kip Thorne and Roger Blandford  - a nice undergraduate textbook
The book is still in progress. Kip welcomes your comments!
Applications of Classical Phyiscs

--> Kip's Ph236 2001  - a great general relativity workout! A very large and updated library of nice problems in classical GR. Very pedagoigical! Nice solutions posted on the web.

--> Ooguri''s ph236 2003   Ooguri makes hard stuff easy!  Nice and easy problem sets. No solutions posted so far.  A nice easy complement to Kip's Ph236 that gives the right climpse of modern phyiscs Kip's classical lecture needs sometimes. Too bad the web site isn't as appealing as the class.

3) Topology

--> Kapustin's Ph229 on Algebraic Topology. First problem sets are very nice. No solutions posted so fat though. Valuable references.

-->  Allan Hatcher's book on   Algebraic topology - Very complete and easy to read if you have 2 years of free time.  Although the book has been published and one can buy it from the web, Allan still gives it for free. Download it, look at it and maybe but it for the nice cover. He has other unfinished books online. Comments and suggestions about those must be welcome.

--> Boronovskiy's MA109 problem sets I haven't looked at it yet. I did hear good things about this class.