Painting. NET was developed in a senior design project for college students directed by Microsoft, aiming at replacing Microsoft's sketchpad program, and now it is maintained by some male alumni who were originally engaged in its development. It has a large number of buttons and similar functions that are very similar to Photoshop, which is a strong candidate for those who seek alternatives similar to Photoshop. I dare say that Paint.NET can do most things that Photoshop can do. GIMPGIMP is undoubtedly a very powerful picture editing software, which has many functions like Photoshop. If you need a program that can create multiple layers, manipulate a single part of a picture, create filters and tools, and support a large number of formats, including most Photoshop native formats such as PSD, then GIMP is the program you are looking for. For those who have used Photoshop before, the interface looks quite familiar. Many buttons on the interface have the same name and similar positions. For those who have never used advanced image editing software, GIMP has a very easy-to-understand list of tutorials, from elementary to advanced, which can be found on the GIMP document page. Or you can learn GIMP online at these five sites. PhotoScapePhotoScape is very user-friendly and has very intuitive project selection functions, from picture editing to GIF creation to mosaic picture wizard or screen capture. Although it doesn't have as many functions as Photoshop, it can do many things that Photoshop users need a lot of clicks to do, only two clicks are needed. Very wijkman's Photo EditorVCW is bundled with optional online photo album software, but it is a very convenient image editing tool even without online photo album function. This program has a very old interface, which looks unattractive, but this tool works well and can complete most of the work required by simple image comparison tools, such as cropping, drawing tools, contrast and color adjustment, effects and filters. This tool also has a video tutorial to help you master all the functions. Picnik- an online selection Picnik is a simple but useful online image editing tool, which can help you make basic adjustments under the "Create button", such as sharpening, red eye or more advanced filter functions, so that you can open functional options, such as text and color effects and many of the same filters that can be found in Photoshop. It is not designed for layer editing or advanced image operation, but it can complete one-button preset adjustment well. But these five softwares only have some functions of Photoshop, and their comprehensiveness is still not as good as Photoshop's.