I use Windows Photo Gallery for that (it's free), there's probably an equivalent if you have a Mac, but I can't say how good it is.

I also use PhotFiltre (free version) for some other tasks, as well as PicMonkey (online editor, the basic stuff is free but you can sign up for a premium account if you want some of the fancier stuff) for some other stuff, as I find each one is really good for some things, not so good for others.