JsonCpp is one of the package requested for latest cmake.
JSON is a lightweight data-interchange format. It can represent numbers,
strings, ordered sequences of values, and collections of name/value pairs.
JsonCpp is a C++ library that allows manipulating JSON values, including
serialization and deserialization to and from strings. It can also
preserve existing comment in unserialization/serialization steps, making
it a convenient format to store user input files.
https://github.com/open-source-parsers/jsoncpp
Already available on Debian, Fedora,..
to download (remove the index.html's) :
wget -r -np -nH --cut-dirs=0 \
http://matzeri.altervista.org/x86/release/jsoncpp/index.html
wget -r -np -nH --cut-dirs=0 \
http://matzeri.altervista.org/x86_64/release/jsoncpp/index.html