string-width
Get the visual width of a string - the number of columns required to display it
widest-line
Get the visual width of the widest line in a string - the number of columns required to display it
str-util
convert full/half width, Chinese/Japanese number, 中日漢字轉換... others util helper
n2words
n2words converts a numerical number into a written one, supports 27 languages and has zero dependencies.