Lightroom – Adobe has a free camera/editing program but without some of the features of the full paid version (which I have). Worth looking at as an alternative to the camera app on your phone. (Apple) (Google)
Photos/Google Photos – the phone cameras are getting better and better as are the apps that you can use to do edits on your pictures. Add Snapseed into the mix here as well – see notes from the the last session. (Apple) (Google)
Flickr – you can publish and share with both Google Photos (preferred) and Apple iCloud, but Flickr is a good choice if you want to present your creations to friends, family or indeed anyone! (Apple) (Google)