ShoeBox - Free unlimited photo storage, so you can rediscover your photos anywhere. Available for iPhone, iPad, Android, Mac and PC.
Instagram Automatic Posting by Iconosquare - Schedule now. We'll post on Instagram for you later!
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.
Later - Schedule and manage your Instagram posts
Snapchat Memories - Save and search for snaps on Snapchat
Storyheap - Manage your SnapChat and Instagram stories.