Gimp - image manipulation program from GNU

GIMP (GNU Image Manipulation Program) is similar to many other image manipulation programs but has the added advantages of coming from a thoroughly trustworthy supplier and is free. As you would expect from a powerful image manipulator there is very little that GIMP can’t do (https://www.gimp.org/). GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and more operating systems. It is free software, you can change its source code and distribute your changes.

GNU is an organisation that is sponsored by the Free Software Foundation and consists basically of a UNIX-like operating system. It also provides many useful programs of which GIMP, the image manipulation program is one (https://www.gnu.org/home.en.html). To learn more about ‘free software’, see https://www.bellarinemac.org.au/index.php/our-activities/bmug-faqs.

From the GIMP website at https://www.gimp.org/man/gimp.html:

Description

GIMP is the GNU Image Manipulation Program. It is used to edit and manipulate images. It can load and save a variety of image formats and can be used to convert between formats.

GIMP can also be used as a paint program. It features a set of drawing and painting tools such as airbrush, clone, pencil, and paint brush. Painting and drawing tools can be applied to an image with a variety of paint modes. It also offers an extensive array of selection tools like rectangle, ellipse, fuzzy select, bezier select, intelligent scissors, and select by color.

GIMP offers a variety of plug-ins that perform a variety of image manipulations. Examples include bumpmap, edge detect, gaussian blur, and many others. In addition, GIMP has several scripting extension which allow for advanced non-interactive processing and creation of images.