Retro - Instagram viewer for iPad
Save From Web - Instagram story, photo, and video downloader - Free, online, and one-click download.
lapse - Instant time-lapse video with no re-rendering
Instander - Instander is a free modification of the Instagram app for android. It contains many improvements over the original application. Instander has a lot of different improvements that give the user an edge over other Instagram users.
BeReal - Everyday at a different time, everyone is notified simultaneously to capture and share a Photo in 2 Minutes.
InstaDp.info - With InstaDp you can view instagram profile picture for free in full(original) size and download it right away.