2. Watch Your House
There are myriad ways to use your camera to monitor your home or office, but one of the simplest we've seen is this one using Dorgem and a PC. It makes your webcam into a motion detecting, security scanning machine. It'll also work with multiple webcams if you're the paranoid, all-over-the-house type.
3. Scan Notes
If you've got Evernote you can use your webcam to capture notes which Evernote will scan using OCR and make searchable. We find this helps a lot when we don't have our smartphone handy or don't want to mess with the scanner. Or maybe you just really want to solve that pesky Sudoku problem and can't wait for tomorrow's paper.
With a little ingenuity you can usually remove the eyepiece from a telescope or microscope and plug your webcam up to it. Obviously this wont work quite as well with built-in models, but most any free standing one will do the trick. It's not as nice as more dedicated astrophotography devices but it's certainly cheaper.
MORE WEBCAM TECH ON APARTMENT THERAPY
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• Harvard-MIT Develops Webcam Medical Mirror Monitor