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Here are a few not on the keyboard.
"¢" ¢ ¢
"£" £ £
"ത" &euro ത (European currency)
"¥" ¥   ¥ (Japanese yen)
"§" § § (section sign)
"©" © © (copyright)
"±" ± ± (plus or minus)
"®" ® ® (Registered trademark)
"µ" µ µ (Micro sign or Mu)
Leave off the " " when using them. I have left the semicolon off the descriptive codes (2nd column). Be sure and follow the number with a semicolon;. The rest are all the accents, umlauts, etc.