ownCloud is a free and opensource file sync and share app which is self hosted.

ACDSee is an image organizer, viewer, and image editor programs for Windows, macOS and iOS.

CloudBuckit is a desktop application that connects all of your cloud storages and FTP servers in one place.

Flickr is an image hosting and video hosting website and web services platform.

Windows Live Photo Gallery is a free photo gallery software for Windows.

Piwigo is photo gallery software for the web, built by an active community of users and developers.