G'MIC

 

Tool:	G'MIC
Description:	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.
Platform:	Website, Windows, Linux
Download:	https://gmic.eu/download.shtml
Review:	https://youtu.be/TSsGBCBc8MU
Ease of Use: Scale of 1 to 5; 1 being easiest, 5 being hardest	2
Costs:	Free