Ambra - Ambra is an innovative Open Source platform for publishing Open Access research articles.
Timehop - Your digital life history
Keepy - Organize & Save your kids' artwork, schoolwork and mementos
2016bestnine - Your best nine Instagram pics from 2016
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Likecreeper - Randomly hit like on a friend's horrifyingly old Instagram