Darius's index filled to the brim with cool links about history, games, progamming, foreign languages, courses on different topics and pretty much every cool link I could find on the internet.
A couple of search engines that I like:
- learnxinyminutes.com--documantion on algorithms & data structures, languages and tools
- yenolam.com--writings and documentation for linux and macs,it even has some cool software
- viewsourcecode.org--links towards source codes and programming walkthroughs
- theswissbay.ch--a treasure of an index, filled to the brim with papers on a variaty of subjects,from politcs to programming
- nelhage.com--writings about software engineering