GraphicsMagick

The free software is easy to install and uses less memory. Thanks to this application; I use image manipulation features such as resizing, rotating, sharpening the image.

One of the biggest challenges I have as a Mac user is often finding images saved as formats only accessible by Mac OS and iOS. I have used several different tools that provide image transitions; however, I have come to love the simplistic but expansive tools offered by GraphicsMagick. GM allows users to convert images from one format to another, create thumbnails, place an image onto a transparent background, create GIF images, and a whole lot more.

They have an incredibly easy to use cropping tool for their node.js module. It makes auto cropping incredibly easy.