Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
New Google Photos - Shared suggestions, libraries and photo books
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
Viso - Beautiful minimal image viewer for MacOS
Photomosh - Turn anything into a vaporwave
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.