file undelete utility

http://www.snapfiles.com/get/restoration.html

Learn Languages and practice with Native Speakers

http://www.livemocha.com/

How can I use wikis in education?

http://educationalwikis.wikispaces.com/

free statistical calculators

http://graphpad.com/quickcalcs/index.cfm

Interactive Statistical Calculation Pages

http://statpages.org/

flash based telephony

http://tringme.com/learnmore.php

convert rext to mp3 easily

http://vozme.com/index.php?lang=en

youlicit

youlicit meant to provide sites similar to the one being viewed.
http://www.youlicit.com/default.aspx