Flickr - image and video hosting website
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
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.
CuteFTP - CuteFTP is a file transfer software engine that provides secure, simple, and powerful file transfers for people all over the world. CuteFTP is a multi-platform software available for Windows and Mac OS. Read more about CuteFTP.