What are some alternatives?
When comparing GIMP and Photoscape, you can also consider the following products
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!