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You can use web tools which help your net life.
  1. Online mkpaswd tool
    Make random password easily to avoid the risk using same password in different sites.
  2. Online string length checker
    Sometimes you want to know the length of the string for the limitation of input and so on. You can use this tool for it.
  3. Your online environment checker
    You can know what kind of information you are giving to the servers without notice.
  4. IP address info checker
    You can get the result of nslookup and whois of the specified ip.
  5. Online stopwatch
    You can use online multiple stopwatchs for time management for your study, work and so on.
  6. Youtube infinity loop player
    You can loop youtube's movie infinitily and share the list with others just by pasting urls.