For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

Teensy Core Libraries for Arduino

Critbit trees in C

Rust language testbed project for porting to STM32F4xx ARM microcontrollers.

Teensy 3.X Project Template

Apache HTTP dynamic image resizing module

The finest radix tree this side of the Linux kernel.