Simkl

Simkl TV Tracker solves the problem of not being able to remember if that movie or show you wanted to watch is on Netflix or Amazon.

The service has a website, computer application (Scrobbler), mobile app and open API to mash up your watched data that combine all your queues in one place. It automatically detects what you're watching, tells you how many episodes you've missed, and connects you to what your friends are into.