http://coreperf.com/projects/rejit/introduction.html Rejit is a regular expression engine that uses a JIT for code generation. It also makes use of fancy modern CPU tricks like SIMD instructions.
http://www.sbnation.com/2014/1/30/5351052/breaking-madden-super-bowl-broncos-seahawks Pushing Madden 25 to its limits.
http://www.nytimes.com/2001/03/17/us/the-last-e-mail-goodbye-from-gwb-to-his-42-buddies.html George W. Bush kept a mailing list of friends right up until he won the presidency.
https://www.trustwave.com/spiderlabs/advisories/TWSL2013-020.txt Satis smart toilets have a hard coded password allowing anyone to flush and lift the lid remotely.
http://en.wikipedia.org/wiki/Suppression_of_the_Society_of_Jesus Now it's payback time for the Jesuits.
http://basalgangster.macgui.com/RetroMacComputing/The_Long_View/The_Long_View.html The Long View writes about long-forgotten technical details from the original Macintosh system.
http://www.joyent.com/blog/introducing-kartlytics-mario-kart-64-analytics Studying Mario Kart performance over time with video analytics software.
http://www.quora.com/Linux/How-many-lines-of-code-if-any-from-Linux-1-0-are-still-in-the-modern-Linux-kernel-and-what-is-it There are more than a few lines of code from Linux 1.0 and even 0.01 in the modern kernel.