You need an image editing software and you do not yet feel ready to buy a Photoshop license. Besides the online retouching sites, there are also free alternatives adapted for each use of the famous Adobe software that will allow you to tinker with the pixel at a lower cost.
Best Alternatives To Photoshop On Linux
GIMP
Gimp is surely the best known free alternative. It is also the most complete because it contains the main features of Photoshop: layer system, color correction, filters, intelligent selection tools (magic wand), brushes, it goes, we are not Too lost. This app is for photo retouchers, comic book authors who want to color their boards and people in administrations who make posters in word-art and comic-sans and stretched photos (stop Word and go to Gimp, really). Visit Gimp official website
Pixlr
You are stuck in a cyber café in Mayenne and you have to do a dingo montage. Hell, you have a machine but can not download anything. Luckily Pixlr is an online program that allows you to retouch your images. There are many great principles of photoshop with a system of layers, the way to adjust its colors, apply filters. Even though the commands are pretty rudimentary going from the interface of photoshop to that of Pixlr is done instinctively, ouaip that is good. Pixlr is available online