F-Stop Media Gallery - Image and video organizer.
ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
A Photo Manager - Manage local photos on Android: gallery, geotag with photomap, tags, find, sort, view, copy...
digiKam - Professional Photo Management with the Power of Open Source
LeafPic - LeafPic is a fluid, material-designed alternative gallery.
Flickr - image and video hosting website