Purrge - Delete iOS photos faster with drag-to-select & upward swipe
Flickr - image and video hosting website
Gemini Photos - Clean up your Camera Roll
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Photowipe - Delete photos quickly and easily from your iPhone
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.