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.

tmux source code

Cross-platform asynchronous I/O

Zstandard - Fast real-time compression algorithm

A flexible distributed key-value database that is optimized for caching and other realtime workloads.

A time-series database for high-performance real-time analytics packaged as a Postgres extension

A library of common data structures and algorithms written in C.

Time Series data structure for Redis

A simple immutable dictionary for Python

Cirron measures performance counters (instructions executed, etc.) and traces system calls a piece of Python or Ruby code executes.