SIM

matrix (web-based green code rain, made with love)

Godot Engine – Multi-platform 2D and 3D game engine

Spike, a RISC-V ISA Simulator

Scalable user load testing tool written in Python

JavaScript 3D library.

Qiskit is an open-source SDK for working with quantum computers at the level of circuits, algorithms, and application modules.

Faker is a PHP library that generates fake data for you