With the free ImageMagick software you can create, edit, compose or convert bitmap images.
Use ImageMagick to easily resize, invert, replace, rotate, deform, cut, transform, customize colors, apply various special effects or design text, lines, polygons, ellipses and curves Bézier on a picture.
ImageMagick as mentioned above is freeware provided as a binary ready to run on your system, or as a source code that you can use, copy, modify, and distribute in both open source and proprietary applications.
Distributed under the Apache 2.0 license.
ImageMagick uses multiple computing subsets to increase performance and can read, edit or write mega-, giga- or tera-pixel image sizes.
The current version of ImageMagick is 7.1.1. The application works on Linux, Windows, Mac OS X, iOS, Android OS and more.
Download the binary you are interested in