... I send out a list of most interesting libraries and apps in the "C++" section to about 1100 subscribers.
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Range-based for loops to iterate over a range of numbers or values
C++ iterators made easy! Zero cost abstractions for C++ iterators.
C++ compile-time enum to string, iteration, in a single header file
Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
UTF-8 with C++ in a Portable Way