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.

OBS Studio - Free and open source software for live streaming and screen recording

TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems

Node.js Desktop Automation.

Dump1090 is a simple Mode S decoder for RTLSDR devices

TrevorC2 is a legitimate website (browsable) that tunnels client/server communications for covert command execution.