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

  

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

  

• 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)

• 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)

   

• Unit Converter (schoolr.com)
  
  

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

• Metric conversions (metric-conversions.org)
  
  

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

• Temperature conversion pages (metric-conversions.org)

• Volume 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

Exercises :

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