callback_printf allows the implementation of portable sprintf, snprintf, vsprintf and vsnprintf like output functions. The code includes wrappers for those functions. It supports all formats of the C 11 standard. wchar_t arguments and strings are printed as UTF-8. It's pretty fast, threadsafe and has no dependencies to other libraries.

fast, portable and full featured wrappers for strtol, strtoul, strtoll and strtoull

A simple and efficient command line numeric system conversion tool written in C. Supports binary, decimal, hexadecimal and octal.

A Python package to convert numerical amounts to words with special handling for Indian Rupees (INR) and Bangladeshi Taka (BDT) with Numeric System Like Lakh, Crore. Useful for financial documents, invoices, and official reports where amounts need to be written out in words.