Pixeluvo is described as 'beautifully designed photo and image editor for PC. It supports everything from simple color and contrast tweaks, cropping and resizing, to complex photo montage with multiple layers, masks and effects' and is an app in the Photos & Graphics category. There are more than 25 alternatives to Pixeluvo for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPad. The best alternative is GIMP, which is both free and Open Source. Other great apps like Pixeluvo are Krita (Free, Open Source), Adobe Photoshop (Paid), Paint.NET (Free Personal) and Affinity Photo (Paid).
Krita is a professional Free and open source (FOSS) painting program. It is made by artists that want to see affordable art tools for everyone withith concept art, texture and matte painters, illustrations and comics.
darktable is a virtual lighttable and darkroom for photographers: it manages your digital negatives in a database and lets you view them through a zoomable lighttable. it also enables you to develop raw images and enhance them.
MyPaint is a fast painting program with an emphasis on full-screen use. It lets you focus on the art instead of the program. You work on your canvas with minimum distractions, bringing up the interface only when you need it.