Gimp works across several different platforms and is probably one of the best free alternatives out there so far. So read on to pick the right one for your specific requirements. These tools are available on different platforms and offer different features for particular editing needs. Here are 18 free Photoshop alternative tools, both downloadable software as well as online tools, to do on-the-go basic image editing. So, what you can do is try a nice substitute for Photoshop that can help you with your image manipulation needs. Especially if you need a tool with just some basic features for day to day image editing needs, then going for Photoshop is certainly not a wise option. But all of these features also make it hefty on your system. Photoshop is the most comprehensive image editing and graphic designing software.