Bitcoin Core integration/staging tree

ClickHouse® is a real-time analytics DBMS

Collection of various algorithms in mathematics, machine learning, computer science and physics implemented in C++ for educational purposes.

Abseil Common Libraries (C++)

World's largest Contributor driven code dataset | Used in Quark Search Engine, @OpenGenus IQ, OpenGenus Visual Project

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.

I2C device library collection for AVR/Arduino or other C++-based MCUs

The best library for implementation of all Data Structures and Algorithms - Trees + Graph Algorithms too!

The SECONDO database