Disclaimer: I actually love perl.
I love engineering, and I love cooking, and I love a website that gives recipes and instructions in a way familiar to me.
It's not a particularly big website, nor groundbreaking, but I like it. It makes some things really simple.
An excellent website full of free audio and video courses for electrical and electronics engineering.
Features courses from MIT, Berkeley, Stanford, Santa Cruz, Cornell, and more.
A web forum has a great discussion by a parent on how to blank the monitor if the kids are yelling too loudly. He manually SSHes into the computer to blank it from a nice vantage point, but enterprising linux folks offer automated solutions; when put into a script running in the background, it looks something like:
1234 | Record audio, analyze
Extract average (RMS) amplitude
Compare against threshold, take action of any
Sleep, repeat
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