A Guy Talking about Math

http://topics.nytimes.com/top/opinion/series/steven_strogatz_on_the_elements_of_math/index.html

Bubble sort as a folk dance

http://www.youtube.com/watch?v=lyZQPjUT5B4&feature=youtu.be

Animaniacs putting it past the censors

http://www.youtube.com/watch?v=9eUMRhnnFhg

Google Person Finder

http://latimesblogs.latimes.com/technology/2011/04/google-person-finder-started-after-haiti-hurrican-katrina-seen-advancement-in-japan-eartquake-tsunam.html

The Sound Processing Swiss Army Knife

sox.sourceforge.net

XKCD April fool's mods

xk3b: http://3d.xkcd.com/
unixkcd: http://uni.xkcd.com/