Be very careful which one you pick. Years ago I chose Picasa, a part of Google. In the fine print your pictures became theirs if they wanted them. Then they changed their service and you could no longer post to other sites and it was very difficult to download your own photos back to your computer. Last week I updated my OS and lost Picasa completely because Google has not updated it. Lots of old photos there.
So look around for what is out there. If you find a good one let me know.
