Awesome GIMP

Preamble

PhotoGIMP - A patch for optimizing GIMP 3+ for Adobe Photoshop users, including features like
SLOS-GIMPainter - SLOS-GIMPainter is a brush package for GIMP 2.10.20 or Later.
G’MIC plugin - G’MIC is a full-featured open-source framework for digital image processing, distributed under the CeCILL free software licenses (LGPL-like and/or GPL-compatible). It provides several user interfaces to convert / process / visualize generic image datasets, ranging from 1D scalar signals to 3D+t sequences of multi-spectral volumetric images, hence including 2D color images.
Batcher - A batch image processing plug-in for GIMP
Resynthesizer - Suite of gimp plugins for texture synthesis
GIMP-ML - A.I. for GNU Image Manipulation Program
Collection of Script by shallowsky - Various Scripts/Plugins see GIMP at shallowsky
Collection of Script by elsamuko - Various Scripts/Plugins see GIMP at elsamuko
Beaver’s third party GEGL Plugins for Gimp - -
The gegl-markup GEGL plug-in - -
GIMP-3-Themes by @bunnywaffle

If you have any feedback, please reach out to me at me@maniu.eu