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.

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com

High-performance time-series aggregation for PostgreSQL

Software synthesizer based on the SoundFont 2 specifications

a realtime plotting utility for terminal/console with data input from stdin

Jamulus enables musicians to perform real-time jam sessions over the internet.

Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.

Monitor the incoming and outgoing traffic metrics in realtime for NGINX

STFT based real-time pitch and timbre shifting in C++ and Python

Release 2 of the openPOWERLINK protocol stack

An efficient OS for IoT.

CANopenNode on Linux devices

Autotune Module for Python "PyAutoTune"

Real-time lossless audio compression in Python

Enduro/X Middleware Platform for Distributed Transaction Processing

Two Level Segregated Fit (TLSF) memory allocator implementation, BSD License

IoT Framework for Generic and Realtime Music Beat Detection

GPU Path Tracer with some realtime features written in C

A free online multi-player realtime roguelike game based on Angband

Live Coding Singing Synthesizer. Python sinsy-NG wrapper.