Web

http://devzone.zend.com/article/2913-Porting-PHP-to-JavaScript some useful php function implemented in JavaScript

http://www.random.org/ :-) here is your web.20 /dev/urandom

http://5ds.ru/ web design studio from Ukraine, also http://free-lance.ru/users/maxtalker/

http://highscalability.com/ A LOT of bits of info, links to slides, posts, videos about BIG websites and their internals

http://poorbuthappy.com/ease/archives/2007/04/29/3616/the-top-10-presentation-on-scaling-websites-twitter-flickr-bloglines-vox-and-more a collection of presentation on hi loaded web apps and their architecture

http://www.ffnn.nl/pages/articles/linux/server-wide-performance-benchmarking.php To get a good idea of the relative impact of the chosen filesystem I also tuned the amount of shared buffers used in the PostgreSQL database software, which powers a number of sites on the server. On top of that, I also took a look at the benefit of using

http://en.wikipedia.org/wiki/Comparison_of_web_application_frameworks

http://www.protectwebform.com/ need a quick and dirty captcha? this is the place!

http://recaptcha.net/learnmore.html cool CAPTCHA that is used to OCR books

http://sam.zoy.org/pwntcha/ well, captcha decoder and the list of good and bad capchas