Ubuntu has been a breakthrough for the novice user in GNU / Linux but we must recognize that currently the biggest problem to pass or not to Ubuntu is the compatibility with the most common programs we use in Windows. Some time ago we talked about alternatives to CAD programs, but there are more programs like Photoshop, An image editing program widely used on Windows and Mac and that in Ubuntu there is no version but if there are great alternatives to it.
Best of all is the alternatives we propose are in the official Ubuntu repositories, which will allow any user, whether novice or an expert user to install their preferred program with a couple of clicks.
Maybe it is the best known and most complete solution that is inside Ubuntu to edit images or create them. For many it is the perfect alternative to Photoshop, but Gimp unlike other programs does not work very well with Photoshop psd files. Something that is being fixed through plugins and add-ons, another part that is giving Gimp success as it allows for considerably expanded Gimp features.
inkscape is a vector graphics program, closer to CorelDraw than PhotoshopBut of course when it comes to vector graphics, Inkscape is better than Photoshop. And like the Adobe program, Inkscape can also create and edit jpg or bmp images, only in a more rudimentary way than Photoshop.
This program comes from the sequel to Calligra and has far surpassed the rest of the programs in its suite. For many Krita is the worthy Photoshop clone and no wonder since the work of recent years has been focused on being the most compatible with native Photoshop files so that the user has no problems in editing them. In addition to this, Krita has a choice of plugins and add-ons which equate it to programs like Gimp or Photoshop. Perhaps the only downside to this program for Ubuntu users is that you need to load QT libraries, Some of them do not have Unity a priori.
This program, while dealing with image editing, is focused on the world of image creation. MyPaint has all the basic tools that a good editing program has, but its orientation is clearly related to image creation and elements through tools such as graphics tablets. If your use of Photoshop is all creative, starting from scratch, MyPaint is your choice.
Conclusion on free alternatives to Photoshop
If you are new to Ubuntu, right now you are wondering which option is better. My answer would be that Gimp, is a very complete and simple image editing program, but if you are looking for something more «guidebook«, Perhaps the best option is Krita, but you can also install both programs and try them, it’s the good thing about Ubuntu and Free Software, which does not have blue screenshots (Unless you cross them with Gimp!)