I don't know about you, but working with notepad or in email programs, I have a tough time finding unusual letters, foreign accents and rare symbols. After some internet sleuthing, I've come up with these to cut-and-paste into the text. Please add more as you find them!
« » « » European quotation marks
¡ ! Upside-down Spanisjh imperative
¿ ? Upside-down Spanish Interrogative
¢ cent
£ pound
¤ circle with dashes at NE, SE, SW, and NW
¥ yen
¦ Vertical line, maybe with gap in middle
§ Section sign (like hurricane symbol on weather maps)
« » « » European quotation marks
¡ ! Upside-down Spanisjh imperative
¿ ? Upside-down Spanish Interrogative
¢ cent
£ pound
¤ circle with dashes at NE, SE, SW, and NW
¥ yen
¦ Vertical line, maybe with gap in middle
§ Section sign (like hurricane symbol on weather maps)
¨ Two dots up in the air
© Copyright sign
® Registered sign (R in a circle)
ª lower case "a" up in the air
« Two small less-than signs: the German open-quote
»Two small greater-than signs: the German close-quote
¯ Macron (horizontal line up in the air)
° Degree sign
± Plus-or-minus sign
º lower case "o" up in the air
¹ 1 up in the air
² 2 up in the air
³ 3 up in the air
` accent grave
´ accent aigue
ˆ circumflex
µ Micro sign, lower case Greek Mu
· Decimal Point (English style, mid-level)
¸ Small sickle shape, low down
¼ One quarter
½ One half
¾ Three quarters
× Times sign: narrow x without serifs
÷ Division sign: a colon with a dash through it
Ð Old English voiced "Th", "D" with dash through upright
> Less than sign.
< Greater than sign.
& ampersand.
" Double quote sign.
¢ Cent sign.
£ Pound sterling.
¤ General currency sign.
¥ Yen sign.
§ Section sign.
¨ Umlaut (dieresis).
© Copyright.
® Registered trademark.
° Degree sign.
· Middle Dot.
¼ Fraction one-fourth.
½ Fraction one-half.
¾ Fraction three-fourths.
ï Small, i, umlaut (dieresis).
¡ Inverted exclamation mark.
Á Capital A, acute accent.
À Capital A, grave accent.
 Captital A, circumflex accent.
à Capital A, tilde.
Å Capital A, ring.
Ä Capital A, dieresis or umlaut mark.
Æ Capital AE dipthong (ligature).
Ç Captital C, cedilla.
É Capital E, acute accent.
È Capital E, grave accent.
Ê Capital E, circumflex accent.
Ë Capital E, dieresis or umlaut mark.
Í Capital I, acute accent.
Ì Capital I, grave accent.
Ï Capital I, dieresis or umlaut mark.
Ð Capital Eth, Icelandic.
Ñ Capital N, tilde.
Ó Capital O, acute accent.
Ò Capital O, grave accent.
Ô Capital O, circumflex accent.
Õ Capital O, tilde.
Ö Capital O, dieresis or umlaut mark.
Ø Capital O, Capital O, slash.
Ú Capital U, acute accent.
Ù Capital U, grave accent.
ˆ Capital U, circumflex accent.
Ü Capital U, dieresis or umlaut mark.
Ý Capital Y, acute accent.
Þ Capital THORN, Icelandic.
ß Small sharp s, German (sz ligature).
á Small a, acute accent.
à Small a, grave accent.
â Small a, circumflex accent.
ã Small a, tilde.
ä Small a, dieresis or umlaut mark.
æ Small a, dipthong (ligature).
ç Small a, cedilla.
é Small e, acute accent.
è Small e, grave accent.
ê Small e, circumflex accent.
ë Small e, dieresis or umlaut mark.
í Small i,acute accent.
ì Small i, grave accent.
î Small i, circumflex accent.
ï Small i,dieresis or umlaut mark.
ð Small eth, Icelandic.
ñ Small n, tilde.
ó Small o, acute accent.
ò Small o, grave accent.
ô Small o, circumflex accent.
õ Small o, tilde.
ö Small o, dieresis or umlaut mark.
ø Small o, slash.
ú Small u, acute accent.
ù Small u, grave accent.
û Small u, circumflex accent.
ü Small u, dieresis or umlaut mark.
ý Small y, acute accent.
þ Small thorn, Icelandic.
ÿ Dieresis or umlaut mark