os/windows/ WinComposeCheatSheet
WinCompose is a great utility for typing in accented characters, emoji, and basically anything that Unicode can do.
This is a dumping ground for characters I actually use. WinCompose is so comprehensive that finding things is akin to a needle in a haystack (though there is search, things still require finding).
Ralt == Right Alt (Alt Gr)
Typographical
en space == Ralt Space N (note capital, so use shift)
em space == Ralt Space M
en dash == Ralt - - .
em dash == Ralt - - -
Horizontal bar == Ralt - ~ -
French/German/Spanish
ú == Ralt ' u
ù == Ralt ` u
ô == Ralt ^ o = Ralt > o
ü == Ralt " u
ç == Ralt , c
ß == Ralt s s
ñ == Ralt ~ n
Quotes
‘ == Ralt ' <
’ == Ralt ' >
“ == Ralt " <
” == Ralt " >
« == Ralt < <
» == Ralt < <
‹ == Ralt . <
› == Ralt . >
„ == Ralt , ,
” == Ralt ' '
“ == Ralt ` `
Bullets
• == Ralt . =
Other
… == Ralt . .
∵ == Ralt " .
∴ == RAlt . "
ø == Ralt o /
÷ == Ralt : -