ClickHouse

A readline and libedit replacement that supports UTF-8, syntax highlighting, hints and Windows and is BSD licensed.

CCTZ is a C++ library for translating between absolute and civil times using the rules of a time zone.

Apache Arrow is a cross-language development platform for in-memory data. It specifies a standardized language-independent columnar memory format for flat and hierarchical data, organized for efficient analytic operations on modern hardware. It also provides computational libraries and zero-copy streaming messaging and interprocess communication…

POCO C++ Libraries - Cross-platform C++ libraries with a network/internet focus.