If you take digital photos, you'll probably want to learn to edit them. For more powerful and complicated editing, there's Photoshop and GIMP. If you want basic editing, there are plenty of simple programs available.
What if your needs are in the middle range? You might need something that gives you a bit of control, but doesn't confuse you. Fortunately there are options for you, as well.
Photoscape is a good choice for this scenario. It offers basic editing tools that are reasonably automated. However, you can go to the next level and tweak settings, to get exactly the effect you need.
In addition to editing, Photoscape includes a batch editor for modifying multiple photos at once. It can also layout photos in page format, combine photos, create animated images and do much more.