Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Tiny Flashlight + LED - Tiny Flashlight + LED is free to use application that can be used anywhere else, having nicely built-in functionality.
Metastream - Watch streaming media with friends
Simple Flashlight - A clean flashlight with an extra bright display and customizable stroboscope.
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
Task Killer - Task Killer is an application which automatically forces other applications to stop which are running in the background, making you enhance your smartphone performance and battery life.