email

• SpamGourmet :: EZ disposable email
• mailinator :: very disposable email (mostly for annoying registration requests)
• sneakemail :: disposable email addresses
• BugMeNot :: communal logins
• hushmail :: pretty darn secure webemail
• FastMail :: highly recommended (by some) free email
• EmailAddresses :: useful fora especially

web

• tiny url :: make short URL
• notlong :: make short URL (another)
• Amazon hack #4: shorten amazon links
  Briefly, write:
  http://amazon.com/o/ASIN/0596004478
  where the last number is the ASIN/ISBN

Local admin

• CUPS :: printer admin
• 2wire :: modem/router

Mozilla: about

• Config
• Plugins

misc

• DjVu -- incredible image compression format, especially for scanned books: replaces TIFF, PostScript, PDF