digiKam - Professional Photo Management with the Power of Open Source
Image Hunter - Image Hunter – Search By Image is a tool that allows you to upload an image or images directly from your mobile device and find all the other existing sources of the image on Google.
ACDSee Photo Studio - ACDSee becomes ACDSee Photo Studio — ACDSee Photo Studio Standard 2018 continues the ACDSee legacy
JS Image Finder - JS Image Finder: Image Search is a powerful, simple, and easy to use application that allows you to search for images from the internet using popular search engines.
Shotwell - Shotwell is an open source photo organizer designed for the GNOME desktop environment.
Camera Roll - Simple Gallery App for Android, with lovely Material Design.