http://htmlhelp.com/reference/html40/entities/special.html

The following table gives the character entity reference, decimal character reference, and hexadecimal character reference for markup-significant and internationalization characters, as well as the rendering of each in your browser. Glyphs of the characters are available at the Unicode Consortium. With the exception of HTML 2.0’s “, &, <, and >, these entities are all new in HTML 4.0 and may not be supported by old browsers. Support in recent browsers is good.

Character Entity Decimal Hex Rendering in Your Browser
Entity Decimal Hex
quotation mark = APL quote " " " " " "
ampersand & & & & & &
less-than sign < < < < < <
greater-than sign > > > > > >
Latin capital ligature OE Œ Œ Œ Œ Œ Œ
Latin small ligature oe œ œ œ œ œ œ
Latin capital letter S with caron Š Š Š Š Š Š
Latin small letter s with caron š š š š š š
Latin capital letter Y with diaeresis Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ
modifier letter circumflex accent ˆ ˆ ˆ ˆ ˆ ˆ
small tilde ˜ ˜ ˜ ˜ ˜ ˜
en space
em space
thin space
zero width non-joiner
zero width joiner
left-to-right mark
right-to-left mark
en dash
em dash
left single quotation mark
right single quotation mark
single low-9 quotation mark
left double quotation mark
right double quotation mark
double low-9 quotation mark
dagger
double dagger
per mille sign
single left-pointing angle quotation mark
single right-pointing angle quotation mark
euro sign