Photoshop by Adobe is pretty much one of these standard graphics programs that many graphic designers and artists use. Unfortunately, Photoshop isn’t free and not every aspiring designer can afford this investment.
The good news is that there are several entirely alternatives to Adobe Photoshop that provide the same functionality for free.
Here are some links for you and lists of the best free alternatives for Photoshop:
If you are not sure which one would be best for your purposes, I recommend that you all simply try them out to find which software package works best for you.