Timehop - Your digital life history
Save From Web - Instagram story, photo, and video downloader - Free, online, and one-click download.
My Year Photo Book - All your year’s Facebook & Instagram moments, in a book!
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.
The Twayback Machine - View your friends' old tweets for fun and trolling
InstaDp.info - With InstaDp you can view instagram profile picture for free in full(original) size and download it right away.