The most obvious tools when you think about graphic design are Photoshop, Inkscape and Gimp, but the majority of designers have more than just these tools available to use. We’ve included two other tools you should consider using and even better, they’re free!
Phatch
Phatch is a great graphic application, where you can create actions to run on a folder of images. There are loads of different actions you can use, including: colorize, contour, crop, invert, mirror, shadow. These are only a handful of options, there are many more available.
Color Scheme Generator
Probably going to be the least used tool in your arsenal, but if you ever need to develop a solid colour scheme then this is perfect. You can create small to large colour schemes and you can retrieve the HEX, HSV and RGB values for each colour.