We've covered free stuff on the iTunes Store before, including some higher education content. But did you know there's a whole directory of educational podcasts, including higher education... READ ON

In 1968, Doug Engelbart led the most famous computer demo of all time. With his team of seventeen researchers working behind the scenes, Engelbart showed off an interactive online system which had been in development since the early 60's. The demo was the coming-out party for the computer mouse (which Engelbart invented, with a colleague), hypertext, screen-sharing, computer-based videoconferencing, and more. You can view the full demo on Google Video, or view an annotated version broken into... READ ON

(Warning, severely geeky content follows.) Programmer Steven Frank, creator of Spamusement and Basketball 2, has done it again. His new zep.pl program uses the power of your computer to randomly combine a set of words, eventually creating the opening lyrics to Led Zeppelin's "Black Dog" after a number of iterations. Let's walk through the source code to understand how: The program is written in Perl, a popular scripting language. All Mac OS X computers include Perl, in case you want to run the... READ ON

Last week we looked at Ben Fry's Atari 2600 Cartridge Source Code project, which used game source code to make attractive, data-rich images. But Mr. Fry has a lot of other interesting projects, including an illustration for a New York Magazine article entitled Linkology that demonstrates how blogs link to each other in a sort of "global popularity poll" (also read: how the image was created). In Fry's image, he presents blogs in a list from left to right, with the more popular blogs starting to the... READ ON