Ecosyste.ms: Packages
An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.
spack.io "gsl-implementations" keyword
gsl-lite
A single-file header-only version of ISO C++ Guidelines Support Library (GSL) for C++98, C++11, a...Latest release: 6 days ago - 794 stars on GitHub - 4 maintainers
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