Hover Zoom - Enlarge thumbnails on mouse over.
2016bestnine - Your best nine Instagram pics from 2016
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature
Timehop - Your digital life history
Hover Zoom+ - Google Chrome extension for zooming images on mouse hover - extesy/hoverzoom
Likecreeper - Randomly hit like on a friend's horrifyingly old Instagram