Links to papers about the algorithm

Paul Harrison's original web page about the resynthesizer

Paul Harrison's PhD thesis about the algorithm

Paul Harrison's academic paper about the algorithm

Wolfram Research makes the app named "Mathematica" that has an inpainting function, one variant of which is the resynthesizer algorithm. Extending Van Gogh’s Starry Night with Inpainting

A commercial product, probably using the algorithm, called "Inpaint"

An alternative Git repository that implements the algorithm, but is not a GIMP plugin, named: "Resynth"