libiconv alternatives and similar libraries

Based on the "Internationalization" category.

utf8.h

5.4 4.5 libiconv VS utf8.h

📚 single header utf8 string functions for C and C++
tinygettext

2.2 3.3 libiconv VS tinygettext

A simple gettext replacement that works directly on .po files

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gettext

- libiconv VS gettext

GNU `gettext'. [GPL2]
IBM ICU

- libiconv VS IBM ICU

A set of C/C++ and Java libraries providing Unicode and Globalization support. [ICU]