Macs come with a program called Photos. Aside from the 800 pound gorilla Photoshop, as among the free or more basic ones, some will have both Mac and Win versions and some won't.

Everyone has their own favorite photo editing programs or websites, I'm sure you'll get several suggestions.

There really isn't such a thing as a "storage program", unless you're referring to some kind of backup. The operating system manages files and folders (or directories) for all applications. A given program simply reads and writes files to where they're pointed to go.

That said, if you're looking for a desktop photo editor ready for just about any task, GIMP is it. Its interface will be immediately familiar to Photoshop users, particularly if you switch on the highly recommended single window mode, and it's still in active development, so new features and filters are regularly added.

I use Free PhotoScape for years and I love it!

I used the wrong term "photo storage." When you open Picasa, all your photos are loaded in that program. That is what I meant.

aputernut that is a lovely example. Thank you.

karl jeppesen, I'm not even slightly familiar with Photoshop. Is Gimp relatively simple to learn?

If you open any program, of any kind, it refers to the folder and the contents that it's been set for (or that its default setting looks at). If you don't like where it's looking or want it to look elsewhere, it's always changeable.

If you only want photo storage take a look at PB=photobucket also Free

If you want storage, just use Google Drive. They give unlimited storage for photos. For freebie photo editing I upvote Karl's suggestion of GIMP. Yes, you'll be using 2 different programs but it's worth it. I use the 800lb gorilla of Photoshop, and Elmer J Fudd is spot on with his characterization of it, once you know how to use it you can make it do amazing things but the learning curve is a BEAST, and the price utterly not worth it unless you use it professionally, which I do.

What do you mean by photo editing? Do you want to correct the color on old pictures? Do you want to add text? Do you want to superimpose images or move stuff around? Do you want to eliminate noisy backgrounds? There are photo editors that make some of these things simple...or you could learn to use Gimp. Gimp does much of what Photoshop does and is only slightly less cumbersome to learn.

I typically clear up old images, change the size to add room for text, and then add text. For those functions I use the free program called Irfanview with the Irfanview add-ins. Irfanview is more of a viewer that will open ever image format and make some adjustments. It's the add-ons that give it super powers.

There is another free program called XnView. I dropped that one back in the 90s in favor or Irfanview, so I don't know what the capabilities are.

Photoscape does all of the above and more, nice frames to add as well, super easy to use, you can combine/join photos as well and add text etc.