There are 2 repositories under noise-functions topic.
A fast simplex noise implementation in Javascript / Typescript.
Generates noise and patterns algorithmically for use in software, textures, and graphics.
Oldschool PlasmaFractal revival with Perlin Noise and WebGL
An implementation of a Value Noise generator in Java.
Interactive demos of procedural terrain generation (mountain generation) using Perlin noise, fractals, domain warping, ridged multifractals, and exponential slope weighting. Built with the aim of exploring game development, computer graphics, and generative art exploration. Pure JS code.