For the basics, I remember the basic photo view/edit app that Windows 7 came with did that. I clearly remember using it before for basic edits to photos for ebay. On times when I need a blur tool for serial numbers I used PhotoScape. Over time I just ended up using PhotoScape. It has all the basic tools I was looking for... crop, blur, white balance, resize, export.
I understand the love for GIMP. It provides great photo functionality for Linux users, but it is terribly slow, buggy, and memory leaky to use professionally. It is clearly not optimized for Windows or even not optimized at all. But I'm not one to complain. It's free.
I have enjoyed Paint.net in the past. I may have to revisit it again.