Online Conversion
Great for working out your weights and measures.
Caloriecount About.com
Good for counting calories.
Nutritiondata
Prefer the previous one, but good one all the same.
Exrx
Good for descriptions and pictures of differing exercises.
Netfit
Similar to exrx.
On a slightly different note.
Oanda
Only tried it once, as I've no real need to use it, but it's good for converting currencies, as it's updated almost every day.
Diet Pills Watchdog
I can persuade, but cannot prevent people taking the crappy weight loss approach, which is to take pills, but at least I can provide an informative link
