[slackline]

Particularly useful websites could be collected here.

I'll get the ball rolling with...Free Online Optical Character Recognition (OCR) - Convert JPEG, PNG, GIF, BMP, TIFF, PDF, DjVu to Text

[Bubba]

Not sure if it's the best one but this is a nicely done flight tracking site: http://www.flightradar24.com/

[slackline]

Recipes for the ingredients in your cupboard