Picnik is a web based photo editing service that you can access from any computer with Internet access.
Creating great product shots can be such a challenge, so anything that makes that process a little easier is a welcomed resource (especially when it’s free). Picnik makes editing your photos EASY and it takes the intimidation away! You aren’t required to download anything to access it and you are able to pull your images from pretty much anywhere, such as your computer, your Flickr, Facebook, or Myspace accounts, as well as various other places.)
So, in addition to being able to easily edit your photos, you have the freedom to work on them from anywhere with an Internet connection.