digiKam - Professional Photo Management with the Power of Open Source
cubeupload - Share images online with zero compression, completely free.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
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.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
LibrePhotos - A self-hosted open source photo management service. This is the repository of the backend. - GitHub - LibrePhotos/librephotos: A self-hosted open source photo management service. This is the reposi...