Various resources used in this project, in no particular order

Interesting and extensive resources:

3D fractals and raymarching
Polygonising distance fields (works with distance estimator)
A research paper on the buddhabrot
Raymarching intro
Path tracing

Opengl:

Opengl fast buffer transfer to cpu
Learn opengl
Rotation matrices in 3D
Opengl docs

Noise:

Webgl noise (easily ported to glsl)
Fast non-sin hash

Clouds:

Scratch a pixel tutorial
Shadertoy implementation
Fast 2D clouds
Comprehensive process about medlling clouds, with source code
A talk from the developer behind the realtime clouds of horizon zero dawn

Mandelbrot set:

In-depth techniques for coloring the mandelbrot set
Mandelbrot plane inversions
Youtuber doing interesting fractal stuff, including mandelbrot inversions
Lots of stuff with mandelbrot set. Big volume, although nothing too new?
Mandelbrot encyclopedia
An implementation of the mandelbulb

Other fractals:

Interesting mandelbox thoughts (parameters etc)
Kaliset
Kaleidoscopic ifs fractals
An overview of the buddhabrot and ways to optimize it
An algorithm for zooming into the buddhabrot (this is nontrivial unlike the case with the mandelbrot set)

Math:

Calculating sin and cos for same angle approximation
Sigmoidal 4pl
A nice and useful curve fitter
A fast method for evaluating polynomials
A fast method for solving complex polynomials
Polynomial division, useful for solving higher-grade polynomials
A deep explanation of some phenomena concerning the littlewood fractal

Curiosities:

Interesting swedish article from another time
Fractal in google (sort of)