Photoshop has been the favourite imaging application for professionals and dedicated amateur photographers but there are many more software packages that are worth looking at including:
Photoshop CC
Lightroom CC
Photoshop Elements 2018
DXO PhotoLab
Affinity Photo
ON1 Photo RAW 2018
Aurora HDR
Corel PaintShop Pro
GIMP
I will be looking at each of these packages and give you our unbiased thoughts on their usefulness.