Darktable - darktable is an open source photography workflow application and raw developer.
Flickr - image and video hosting website
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
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.