I have to figure out how to do these on the Macintosh, but:
 | ALT 0194 | Latin capital letter A with circumflex |
â | ALT 131 or ALT 0226 | Latin small letter a with circumflex |
Ç | ALT 128 or ALT 0199 | Latin capital letter C with cedilla |
ç | ALT 135 or ALT 0231 | Latin small letter c with cedilla |
Ğ | ALT 0286 | Latin capital letter G with breve |
ğ | ALT 0287 | Latin small letter g with breve |
Î | ALT 0206 | Latin capital letter I with circumflex |
î | ALT 140 or ALT 0238 | Latin small letter i with circumflex |
İ | ALT 0304 | Latin capital letter I with dot above |
ı | ALT 0305 | Latin small letter dotless i |
Ö | ALT 153 or ALT 0214 | Latin capital letter O with diaeresis, O with umlaut |
ö | ALT 148 or ALT 0246 | Latin small letter o with diaeresis, o with umlaut |
Ş | ALT 0350 | Latin capital letter S with cedilla |
ş | ALT 0351 | Latin small letter s with cedilla |
Ü | ALT 154 or ALT 0220 | Latin capital letter U with diaeresis, U with umlaut |
ü | ALT 129 or ALT 0252 | Latin small letter u with diaeresis, u with umlaut |
Û | ALT 0219 | Latin capital letter U with circumflex |
û | ALT 150 or ALT 0251 | Latin small letter u with circumflex |
₺ | ALT 8378 | Turkish lira sign |
Axé.