F-Stop Media Gallery - Image and video organizer.
Darktable - darktable is an open source photography workflow application and raw developer.
Camera Roll - Simple Gallery App for Android, with lovely Material Design.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
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.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.