digiKam - Professional Photo Management with the Power of Open Source
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Flickr - image and video hosting website
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.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.