CONVERTERS :

• Convert an online video file to MP3
  Enter the URL of the video you want to convert to MP3. You can choose Standard Quality or High Quality.
  Convert. Download.
  (video2mp3.net)
  
  

• Tiny Youtube Converter lets you convert Youtube videos to mp3
  (tiny-youtube-converter.com)

  

• Convert just about anything to anything else (onlineconversion) :
  Length/Distance, Temperature, Speed, Volume (Liquid and Dry), Weight, Metric, Computer, Date/Time, Cooking, Angles, Area Square, Power Watts, Energy Joules, Density, Force, Pressure, Astronomical, Numbers, Finance, Clothing, Light, Flow Rate and Acceleration

• Unit Converter (schoolr.com)
  
  

• Convertir des documents PDF en Word (convertpdftoword.net)

  

• ListenToYouTube.com
  "is the most convenient online application for converting YouTube flash video to MP3 audio.
  This service is fast, free, and requires no signup."
  (listentoyoutube.com)

WEIGHTS and MEASURES :

• Common Equivalent Weights and Measures (chemistry.berkeley.edu) :
  Units / Metric Equivalent / US Equivalent

• Metric conversions (metric-conversions.org)
  
  

• Length and Distance conversion pages (metric-conversions.org)

• Weight conversion pages (metric-conversions.org)

• Measures and Weights (englisch-hilfen.de) :
  - Linear measures
  - Nautical measures
  - Liquid measures of capacity (BRITISH and AMERICAN)
  - Avoirdupois weights
  - Temperature conversion

• Temperature conversion pages (metric-conversions.org)

• Volume conversion pages (metric-conversions.org)
  

COOKING :

• How many grams are in a cup?
  "Here are A FEW COMMON FOODS and their conversion from cups to grams..."
  (wiki.answers.com)

• Conversion Table for Cooking! (botanical.com)
  
  
  
  
  
  
• Cooking Measures and Conversion Calculator with British and U.S. Cooking Terms (globalgourmet.com)
  
  
  

MONEY :

• Current Value of Old Money (ex.ac.uk)
  
  
  
• What is a dollar worth? - Limited to years from 1913 to 2005
  Example : "What would an item or service purchased in 19?? be worth in 2005 dollars?..."
  (Federal Reserve Bank of Minneapolis)

EXERCISES :

• Basic Measurements You Should Know - a quiz (5 questions) - (mrsbogucki.com)